diff --git a/grpc/ruby_client/client.rb b/grpc/ruby_client/client.rb
new file mode 100644
index 0000000..9e1352d
--- /dev/null
+++ b/grpc/ruby_client/client.rb
@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+require 'grpc'
+require './proto/helloworld_services_pb'
+require './proto/notification_services_pb'
+
+# 通常のレスポンス
+http_client = Sample::Greeter::Stub.new(
+  '127.0.0.1:5502',
+  :this_channel_is_insecure
+)
+
+request_opts = Sample::HelloRequest.new(first_name: 'John', last_name: 'Doe')
+http_response = http_client.say_hello(request_opts)
+puts http_response
+
+puts '====================='
+
+# Streamなレスポンスを受け取ったとき
+stream_client = Sample::Notifier::Stub.new(
+  '127.0.0.1:5502',
+  :this_channel_is_insecure
+)
+
+request_opts = Sample::HelloRequest.new(first_name: '太郎', last_name: '兼進')
+stream_request = stream_client.pereodic_hello(request_opts)
+stream_request.each { |req| puts req }
diff --git a/grpc/ruby_client/proto/helloworld_services_pb.rb b/grpc/ruby_client/proto/helloworld_services_pb.rb
index 583dbf5..4cc973a 100644
--- a/grpc/ruby_client/proto/helloworld_services_pb.rb
+++ b/grpc/ruby_client/proto/helloworld_services_pb.rb
@@ -1,15 +1,16 @@
+# frozen_string_literal: true
+
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
 # Source: proto/helloworld.proto for package 'sample'
 
 require 'grpc'
-require 'proto/helloworld_pb'
+require './proto/helloworld_pb'
 
 module Sample
   module Greeter
     # The greeting service definition.
     # gRPCのサービス
     class Service
-
       include GRPC::GenericService
 
       self.marshal_class_method = :encode
diff --git a/grpc/ruby_client/proto/notification_services_pb.rb b/grpc/ruby_client/proto/notification_services_pb.rb
index 17cdc0e..7426d2f 100644
--- a/grpc/ruby_client/proto/notification_services_pb.rb
+++ b/grpc/ruby_client/proto/notification_services_pb.rb
@@ -1,14 +1,15 @@
+# frozen_string_literal: true
+
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
 # Source: proto/notification.proto for package 'sample'
 
 require 'grpc'
-require 'proto/notification_pb'
+require './proto/notification_pb'
 
 module Sample
   module Notifier
     # The greeting service definition.
     class Service
-
       include GRPC::GenericService
 
       self.marshal_class_method = :encode