diff --git a/graphene/types/decimal.py b/graphene/types/decimal.py
index 69952f96..25277000 100644
--- a/graphene/types/decimal.py
+++ b/graphene/types/decimal.py
@@ -28,6 +28,8 @@ class Decimal(Scalar):
 
     @staticmethod
     def parse_value(value):
+        if value == "":
+            return None
         try:
             return _Decimal(value)
         except Exception:
diff --git a/graphene/types/tests/test_decimal.py b/graphene/types/tests/test_decimal.py
index 1ba48bd1..4662c064 100644
--- a/graphene/types/tests/test_decimal.py
+++ b/graphene/types/tests/test_decimal.py
@@ -66,3 +66,10 @@ def test_decimal_string_query_integer():
     assert not result.errors
     assert result.data == {"decimal": str(decimal_value)}
     assert decimal.Decimal(result.data["decimal"]) == decimal_value
+
+def test_parse_decimal_empty_string():
+    """Parsing an empty string should return None"""
+    result = schema.execute("""{ decimal(input: \"\") }""")
+    assert not result.errors
+    assert result.data == {"decimal": None}
+