diff --git a/dependency_injector/injections.py b/dependency_injector/injections.py
deleted file mode 100644
index 14c9bd68..00000000
--- a/dependency_injector/injections.py
+++ /dev/null
@@ -1,113 +0,0 @@
-"""Dependency injector injections module."""
-
-import warnings
-
-import six
-
-from dependency_injector.providers.base import (
-    _parse_positional_injections,
-    _parse_keyword_injections,
-)
-from dependency_injector import utils
-from dependency_injector import errors
-
-
-def inject(*args, **kwargs):
-    """Dependency injection decorator.
-
-    .. warning::
-
-        :py:func:`inject` decorator has been deprecated since version 2.2.0.
-
-        Usage of :py:func:`inject` decorator can lead to bad design and could
-        be considered as anti-pattern.
-
-    :py:func:`inject` decorator can be used for making inline dependency
-    injections. It patches decorated callable in such way that dependency
-    injection will be done during every call of decorated callable.
-
-    :py:func:`inject` decorator supports different syntaxes of passing
-    injections:
-
-    .. code-block:: python
-
-        # Positional arguments injections:
-        @inject(1, 2)
-        def some_function(arg1, arg2):
-            pass
-
-        # Keyword arguments injections:
-        @inject(arg1=1)
-        @inject(arg2=2)
-        def some_function(arg1, arg2):
-            pass
-
-        # Keyword arguments injections into class init:
-        @inject(arg1=1)
-        @inject(arg2=2)
-        class SomeClass(object):
-
-            def __init__(self, arg1, arg2):
-                pass
-
-    .. deprecated:: 2.2.0
-        Usage of :py:func:`inject` decorator can lead to bad design and could
-        be considered as anti-pattern.
-
-    :param args: Tuple of context positional arguments.
-    :type args: tuple[object]
-
-    :param kwargs: Dictionary of context keyword arguments.
-    :type kwargs: dict[str, object]
-
-    :return: Class / callable decorator
-    :rtype: (callable) -> (type | callable)
-    """
-    warnings.warn(message='Call to a deprecated decorator - @{0}.{1}'
-                          .format(inject.__module__, inject.__name__),
-                  category=DeprecationWarning,
-                  stacklevel=2)
-
-    arg_injections = _parse_positional_injections(args)
-    kwarg_injections = _parse_keyword_injections(kwargs)
-
-    def decorator(callback_or_cls):
-        """Dependency injection decorator."""
-        if isinstance(callback_or_cls, six.class_types):
-            cls = callback_or_cls
-            cls_init = utils.fetch_cls_init(cls)
-            if not cls_init:
-                raise errors.Error(
-                    'Class {0}.{1} has no __init__() '.format(cls.__module__,
-                                                              cls.__name__) +
-                    'method and could not be decorated with @inject decorator')
-            cls.__init__ = decorator(cls_init)
-            return cls
-
-        callback = callback_or_cls
-
-        if hasattr(callback, '__INJECT_DECORATED__'):
-            callback.args += arg_injections
-            callback.kwargs.update(kwarg_injections)
-            return callback
-
-        @six.wraps(callback)
-        def decorated(*args, **kwargs):
-            """Decorated with dependency injection callback."""
-            if decorated.args:
-                args = tuple(arg.provide_injection()
-                             for arg in decorated.args) + args
-
-            for name, arg in six.iteritems(decorated.kwargs):
-                if name not in kwargs:
-                    kwargs[name] = arg.provide_injection()
-
-            return callback(*args, **kwargs)
-
-        decorated.__INJECT_DECORATED__ = True
-        decorated.origin = callback
-        decorated.args = arg_injections
-        decorated.kwargs = kwarg_injections
-
-        return decorated
-    return decorator
diff --git a/dependency_injector/utils.py b/dependency_injector/utils.py
index f113bb71..cfe8b31e 100644
--- a/dependency_injector/utils.py
+++ b/dependency_injector/utils.py
@@ -1,6 +1,5 @@
 """Dependency injector utils module."""
 
-import sys
 import copy as _copy
 import types
 import threading
@@ -16,12 +15,6 @@ GLOBAL_LOCK = threading.RLock()
 :type: :py:class:`threading.RLock`
 """
 
-_IS_PYPY = '__pypy__' in sys.builtin_module_names
-if _IS_PYPY or six.PY3:  # pragma: no cover
-    _OBJECT_INIT = six.get_unbound_function(object.__init__)
-else:  # pragma: no cover
-    _OBJECT_INIT = None
-
 if six.PY2:  # pragma: no cover
     _copy._deepcopy_dispatch[types.MethodType] = \
         lambda obj, memo: type(obj)(obj.im_func,
@@ -90,24 +83,6 @@ def represent_provider(provider, provides):
         address=hex(id(provider)))
 
 
-def fetch_cls_init(cls):
-    """Return reference to the class.__init__() method if it is defined.
-
-    :param cls: Class instance
-    :type cls: type
-
-    :return: Reference to the class.__init__() if any, or None otherwise.
-    :rtype: unbound method | None
-    """
-    try:
-        cls_init = six.get_unbound_function(cls.__init__)
-        assert cls_init is not _OBJECT_INIT
-    except (AttributeError, AssertionError):
-        return None
-    else:
-        return cls_init
-
-
 def deepcopy(instance, memo=None):
     """Make full copy of instance."""
     return _copy.deepcopy(instance, memo)
diff --git a/docs/advanced_usage/index.rst b/docs/advanced_usage/index.rst
deleted file mode 100644
index cd4ce33a..00000000
--- a/docs/advanced_usage/index.rst
+++ /dev/null
@@ -1,70 +0,0 @@
-Advanced usage
-==============
-
-Current section of documentation describes advanced usage of 
-*Dependency Injector*.
-
-@inject decorator
------------------
-
-.. currentmodule:: dependency_injector.injections
-
-.. warning::
-
-    :py:func:`inject` decorator has been deprecated since version 2.2.0.
-
-:py:func:`inject` decorator is a part of 
-:py:mod:`dependency_injector.injections` module.
-
-:py:func:`inject` decorator can be used for making *inline* dependency 
-injections.  It *patches* decorated callable in such way that dependency 
-injection will be done during every call of decorated callable.
-
-:py:func:`inject` takes a various number of positional and keyword arguments 
-that are used as decorated callable injections. Every time, when 
-:py:func:`inject` is called, positional and keyword argument injections would 
-be passed as an callable arguments.
-
-Such behaviour is very similar to the standard Python ``functools.partial`` 
-object, except of one thing: all injectable values are provided 
-*"as is"*, except of providers (subclasses of 
-:py:class:`dependency_injector.providers.Provider`). Providers 
-will be called every time, when injection needs to be done. For example, 
-if injectable value of injection is a 
-:py:class:`dependency_injector.providers.Factory`, it will provide new one 
-instance (as a result of its call) every time, when injection needs to be done.
-
-:py:func:`inject` behaviour with context positional and keyword arguments is 
-very like a standard Python ``functools.partial``:
-
-- Positional context arguments will be appended after :py:func:`inject` 
-  positional injections.
-- Keyword context arguments have priority on :py:func:`inject` keyword 
-  injections and will be merged over them.
-
-Example:
-
-.. literalinclude:: ../../examples/advanced_usage/inject_simple.py
-   :language: python
-   :linenos:
-
-Example of usage :py:func:`inject` decorator with Flask:
-
-.. literalinclude:: ../../examples/advanced_usage/inject_flask.py
-   :language: python
-   :linenos:
-
-
-@inject decorator with classes
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-:py:func:`inject` could be applied for classes. In such case, it will look for 
-class ``__init__()`` method and pass injection to it. If decorated class has 
-no ``__init__()`` method, appropriate 
-:py:exc:`dependency_injector.errors.Error` will be raised.
-
-Example of usage :py:func:`inject` with Flask class-based view:
-
-.. literalinclude:: ../../examples/advanced_usage/inject_flask_class_based.py
-   :language: python
-   :linenos:
diff --git a/docs/api/injections.rst b/docs/api/injections.rst
deleted file mode 100644
index 794176c9..00000000
--- a/docs/api/injections.rst
+++ /dev/null
@@ -1,7 +0,0 @@
-``dependency_injector.injections``
-----------------------------------
-
-.. automodule:: dependency_injector.injections
-   :members:
-   :inherited-members:
-   :show-inheritance:
diff --git a/docs/main/changelog.rst b/docs/main/changelog.rst
index 76b22b9b..4de4f4e6 100644
--- a/docs/main/changelog.rst
+++ b/docs/main/changelog.rst
@@ -9,7 +9,10 @@ follows `Semantic versioning`_
 
 Development version
 -------------------
-- No features.
+- Remove ``@inject`` decorator.
+
+.. - No features.
+
 
 2.2.10
 ------
diff --git a/tests/providers/test_creational.py b/tests/providers/test_creational.py
index fc4c71b2..7bb7938c 100644
--- a/tests/providers/test_creational.py
+++ b/tests/providers/test_creational.py
@@ -2,7 +2,7 @@
 
 import unittest2 as unittest
 
-from dependency_injector import providers, injections, utils, errors
+from dependency_injector import providers, utils, errors
 
 
 class Example(object):
@@ -731,26 +731,6 @@ class DelegatedThreadLocalSingletonTests(unittest.TestCase):
 class FactoryAsDecoratorTests(unittest.TestCase):
     """Factory as decorator tests."""
 
-    def test_decoration(self):
-        """Test decoration of some class with Factory provider."""
-        @providers.Factory
-        class AuthService(object):
-            """Auth service."""
-
-        @providers.Factory
-        @injections.inject(auth_service=AuthService)
-        class UsersService(object):
-            """Users service."""
-
-            def __init__(self, auth_service):
-                """Initializer."""
-                self.auth_service = auth_service
-
-        users_service = UsersService()
-
-        self.assertIsInstance(users_service, UsersService.cls)
-        self.assertIsInstance(users_service.auth_service, AuthService.cls)
-
     def test_decoration_and_overriding(self):
         """Test decoration of some class with Factory provider."""
         @providers.Factory
diff --git a/tests/test_injections.py b/tests/test_injections.py
deleted file mode 100644
index 302ea8de..00000000
--- a/tests/test_injections.py
+++ /dev/null
@@ -1,202 +0,0 @@
-"""Dependency injector injections unittests."""
-
-import warnings
-
-import unittest2 as unittest
-
-from dependency_injector import injections
-from dependency_injector import providers
-from dependency_injector import errors
-
-
-class InjectTests(unittest.TestCase):
-    """Inject decorator test cases."""
-
-    def test_decorated_args(self):
-        """Test `inject()` decoration with args."""
-        provider1 = providers.Factory(object)
-        provider2 = providers.Factory(list)
-
-        @injections.inject(provider1, provider2)
-        def test(a, b):
-            return a, b
-
-        a1, b1 = test()
-        a2, b2 = test()
-
-        self.assertIsInstance(a1, object)
-        self.assertIsInstance(a2, object)
-        self.assertIsNot(a1, a2)
-
-        self.assertIsInstance(b1, list)
-        self.assertIsInstance(b2, list)
-        self.assertIsNot(b1, b2)
-
-    def test_decorated_args_several_times(self):
-        """Test `inject()` decoration with args several times."""
-        provider1 = providers.Factory(object)
-        provider2 = providers.Factory(list)
-
-        @injections.inject(provider2)
-        @injections.inject(provider1)
-        def test(a, b):
-            return a, b
-
-        a1, b1 = test()
-        a2, b2 = test()
-
-        self.assertIsInstance(a1, object)
-        self.assertIsInstance(a2, object)
-        self.assertIsNot(a1, a2)
-
-        self.assertIsInstance(b1, list)
-        self.assertIsInstance(b2, list)
-        self.assertIsNot(b1, b2)
-
-    def test_decorated_context_args(self):
-        """Test `inject()` decoration with context args."""
-        provider1 = providers.Factory(object)
-        provider2 = providers.Factory(list)
-
-        @injections.inject(provider1)
-        def test(a, b):
-            return a, b
-
-        a1, b1 = test(provider2())
-        a2, b2 = test(provider2())
-
-        self.assertIsInstance(a1, object)
-        self.assertIsInstance(a2, object)
-        self.assertIsNot(a1, a2)
-
-        self.assertIsInstance(b1, list)
-        self.assertIsInstance(b2, list)
-        self.assertIsNot(b1, b2)
-
-    def test_decorated_kwargs(self):
-        """Test `inject()` decoration with kwargs."""
-        provider1 = providers.Factory(object)
-        provider2 = providers.Factory(list)
-
-        @injections.inject(a=provider1)
-        @injections.inject(b=provider2)
-        def test(a, b):
-            return a, b
-
-        a1, b1 = test()
-        a2, b2 = test()
-
-        self.assertIsInstance(a1, object)
-        self.assertIsInstance(a2, object)
-        self.assertIsNot(a1, a2)
-
-        self.assertIsInstance(b1, list)
-        self.assertIsInstance(b2, list)
-        self.assertIsNot(b1, b2)
-
-    def test_decorated_kwargs_priority(self):
-        """Test `inject()` decorated callback kwargs priority."""
-        provider1 = providers.Factory(object)
-        provider2 = providers.Factory(list)
-        object_a = object()
-
-        @injections.inject(a=provider1)
-        @injections.inject(b=provider2)
-        def test(a, b):
-            return a, b
-
-        a1, b1 = test(a=object_a)
-        a2, b2 = test(a=object_a)
-
-        self.assertIsInstance(a1, object)
-        self.assertIsInstance(a2, object)
-        self.assertIs(a1, object_a)
-        self.assertIs(a2, object_a)
-
-        self.assertIsInstance(b1, list)
-        self.assertIsInstance(b2, list)
-        self.assertIsNot(b1, b2)
-
-    def test_decorated_with_args(self):
-        """Test `inject()` decorated callback with args."""
-        provider = providers.Factory(list)
-        object_a = object()
-
-        @injections.inject(b=provider)
-        def test(a, b):
-            return a, b
-
-        a1, b1 = test(object_a)
-        a2, b2 = test(object_a)
-
-        self.assertIsInstance(a1, object)
-        self.assertIsInstance(a2, object)
-        self.assertIs(a1, object_a)
-        self.assertIs(a2, object_a)
-
-        self.assertIsInstance(b1, list)
-        self.assertIsInstance(b2, list)
-        self.assertIsNot(b1, b2)
-
-    def test_decorate_class_method(self):
-        """Test `inject()` decorator with class method."""
-        class Test(object):
-            """Test class."""
-
-            @injections.inject(arg1=123)
-            @injections.inject(arg2=456)
-            def some_method(self, arg1, arg2):
-                """Some test method."""
-                return arg1, arg2
-
-        test_object = Test()
-        arg1, arg2 = test_object.some_method()
-
-        self.assertEquals(arg1, 123)
-        self.assertEquals(arg2, 456)
-
-    def test_decorate_class_with_init(self):
-        """Test `inject()` decorator that decorate class with __init__."""
-        @injections.inject(arg1=123)
-        @injections.inject(arg2=456)
-        class Test(object):
-            """Test class."""
-
-            def __init__(self, arg1, arg2):
-                """Init."""
-                self.arg1 = arg1
-                self.arg2 = arg2
-
-        test_object = Test()
-
-        self.assertEquals(test_object.arg1, 123)
-        self.assertEquals(test_object.arg2, 456)
-
-    def test_decorate_class_without_init(self):
-        """Test `inject()` decorator that decorate class without __init__."""
-        with self.assertRaises(errors.Error):
-            @injections.inject(arg1=123)
-            class Test(object):
-                """Test class."""
-
-
-class InjectDeprecationTests(unittest.TestCase):
-    """Deprecation of `@inject()` tests."""
-
-    def test_deprecation_warning_on_usage(self):
-        """Test that DeprecationWarning is produced when `@inject` is used."""
-        with warnings.catch_warnings(record=True) as caught_warnings:
-            warnings.simplefilter('always')
-
-            @injections.inject(1)
-            def _example(arg):
-                pass
-
-            warnings.simplefilter('default')
-
-        self.assertEquals(len(caught_warnings), 1)
-        self.assertEquals(caught_warnings[-1].category, DeprecationWarning)
-        self.assertIn('Call to a deprecated decorator',
-                      str(caught_warnings[-1].message))
-        self.assertIn('@dependency_injector.injections.inject',
-                      str(caught_warnings[-1].message))