diff --git a/src/services/__tests__/fixtures/3.1/patternProperties.json b/src/services/__tests__/fixtures/3.1/patternProperties.json
index ec686421..39928813 100644
--- a/src/services/__tests__/fixtures/3.1/patternProperties.json
+++ b/src/services/__tests__/fixtures/3.1/patternProperties.json
@@ -25,6 +25,26 @@
               }
             }
           }
+        },
+        "properties": {
+          "nestedObjectProp": {
+            "type": "object",
+            "patternProperties": {
+              ".*": {
+                "type": "integer"
+              }
+            }
+          },
+          "nestedArrayProp": {
+            "type": "array",
+            "items": {
+              "patternProperties": {
+                ".*": {
+                  "type": "string"
+                }
+              }
+            }
+          }
         }
       }
     }
diff --git a/src/services/__tests__/models/Schema.test.ts b/src/services/__tests__/models/Schema.test.ts
index 89c44365..8e73879a 100644
--- a/src/services/__tests__/models/Schema.test.ts
+++ b/src/services/__tests__/models/Schema.test.ts
@@ -107,11 +107,22 @@ describe('Models', () => {
       const spec = require('../fixtures/3.1/patternProperties.json');
       parser = new OpenAPIParser(spec, undefined, opts);
       const schema = new SchemaModel(parser, spec.components.schemas.Patterns, '', opts);
-      expect(schema.fields).toHaveLength(2);
-      expect(schema.fields![0].kind).toEqual('patternProperties');
-      expect(schema.fields![0].schema.type).toEqual('string');
-      expect(schema.fields![1].kind).toEqual('patternProperties');
-      expect(schema.fields![1].schema.type).toEqual('object');
+
+      expect(schema.fields).toHaveLength(4);
+      expect(schema.fields![0].kind).toEqual('field');
+      expect(schema.fields![0].name).toEqual('nestedObjectProp');
+      expect(schema.fields![0].schema.type).toEqual('object');
+      expect(schema.fields![0].schema.fields![0].kind).toEqual('patternProperties');
+
+      expect(schema.fields).toHaveLength(4);
+      expect(schema.fields![1].kind).toEqual('field');
+      expect(schema.fields![1].name).toEqual('nestedArrayProp');
+      expect(schema.fields![1].schema.items!.fields![0].kind).toEqual('patternProperties');
+
+      expect(schema.fields![2].kind).toEqual('patternProperties');
+      expect(schema.fields![2].schema.type).toEqual('string');
+      expect(schema.fields![3].kind).toEqual('patternProperties');
+      expect(schema.fields![3].schema.type).toEqual('object');
     });
 
     describe('type array', () => {
diff --git a/src/utils/openapi.ts b/src/utils/openapi.ts
index 2e47399f..272f04f9 100644
--- a/src/utils/openapi.ts
+++ b/src/utils/openapi.ts
@@ -136,7 +136,9 @@ export function isPrimitiveType(
     isPrimitive =
       schema.properties !== undefined
         ? Object.keys(schema.properties).length === 0
-        : schema.additionalProperties === undefined && schema.unevaluatedProperties === undefined;
+        : schema.additionalProperties === undefined &&
+          schema.unevaluatedProperties === undefined &&
+          schema.patternProperties === undefined;
   }
 
   if (isArray(schema.items) || isArray(schema.prefixItems)) {