diff --git a/lib/openapi_parser/concerns/parameter_validatable.rb b/lib/openapi_parser/concerns/parameter_validatable.rb
index 78c7031..1e56377 100644
--- a/lib/openapi_parser/concerns/parameter_validatable.rb
+++ b/lib/openapi_parser/concerns/parameter_validatable.rb
@@ -13,6 +13,18 @@ def validate_request_parameter(params, headers, options)
     validate_query_parameter(params, object_reference, options)
   end
 
+  def header_parameter_hash
+    divided_parameter_hash['header'] || {}
+  end
+
+  def path_parameter_hash
+    divided_parameter_hash['path'] || {}
+  end
+
+  def query_parameter_hash
+    divided_parameter_hash['query'] || {}
+  end
+
   private
 
     # @param [Hash] params query parameter hash
@@ -29,18 +41,6 @@ def validate_header_parameter(headers, object_reference, options)
       OpenAPIParser::ParameterValidator.validate_parameter(header_parameter_hash, headers, object_reference, options, true)
     end
 
-    def header_parameter_hash
-      divided_parameter_hash['header'] || []
-    end
-
-    def path_parameter_hash
-      divided_parameter_hash['path'] || []
-    end
-
-    def query_parameter_hash
-      divided_parameter_hash['query'] || []
-    end
-
     # @return [Hash{String => Hash{String => Parameter}}] hash[in][name] => Parameter
     def divided_parameter_hash
       @divided_parameter_hash ||=
diff --git a/lib/openapi_parser/request_operation.rb b/lib/openapi_parser/request_operation.rb
index f6b4d07..d0312b9 100644
--- a/lib/openapi_parser/request_operation.rb
+++ b/lib/openapi_parser/request_operation.rb
@@ -65,7 +65,6 @@ def validate_response_body(response_body, response_validate_options = nil)
   # @param [OpenAPIParser::SchemaValidator::Options] options request validator options
   def validate_request_parameter(params, headers, options = nil)
     options ||= config.request_validator_options
-    path_item&.validate_request_parameter(params, headers, options)
     operation_object&.validate_request_parameter(params, headers, options)
   end
 
diff --git a/lib/openapi_parser/schemas/operation.rb b/lib/openapi_parser/schemas/operation.rb
index 96b729c..d5fe12e 100644
--- a/lib/openapi_parser/schemas/operation.rb
+++ b/lib/openapi_parser/schemas/operation.rb
@@ -7,6 +7,8 @@ module OpenAPIParser::Schemas
   class Operation < Base
     include OpenAPIParser::ParameterValidatable
 
+    alias path_item parent
+
     openapi_attr_values :tags, :summary, :description, :deprecated
 
     openapi_attr_value :operation_id, schema_key: :operationId
@@ -30,5 +32,18 @@ def validate_request_body(content_type, params, options)
     def validate_response(response_body, response_validate_options)
       responses&.validate(response_body, response_validate_options)
     end
+
+    def header_parameter_hash
+      @header_parameter_hash ||= path_item.header_parameter_hash.merge(super)
+    end
+
+    def path_parameter_hash
+      @path_parameter_hash ||= path_item.path_parameter_hash.merge(super)
+    end
+
+    def query_parameter_hash
+      @query_parameter_hash ||= path_item.query_parameter_hash.merge(super)
+    end
+
   end
 end