diff --git a/amazon_transcribe_handler.go b/amazon_transcribe_handler.go
index a2cbbce..2c9b27e 100644
--- a/amazon_transcribe_handler.go
+++ b/amazon_transcribe_handler.go
@@ -12,7 +12,7 @@ import (
 )
 
 func init() {
-	ServiceHandlers.Register("aws", new(AmazonTranscribeHandler))
+	ServiceHandlerMakers.Register("aws", new(AmazonTranscribeHandlerMaker))
 }
 
 type AmazonTranscribeHandler struct {
@@ -29,7 +29,9 @@ type AmazonTranscribeHandler struct {
 	OnResultFunc func(context.Context, io.WriteCloser, string, string, string, any) error
 }
 
-func (h *AmazonTranscribeHandler) New(config Config, channelID, connectionID string, sampleRate uint32, channelCount uint16, languageCode string, onResultFunc any) serviceHandlerInterface {
+type AmazonTranscribeHandlerMaker struct{}
+
+func (h *AmazonTranscribeHandlerMaker) New(config Config, channelID, connectionID string, sampleRate uint32, channelCount uint16, languageCode string, onResultFunc any) serviceHandlerInterface {
 	return &AmazonTranscribeHandler{
 		Config:       config,
 		ChannelID:    channelID,
diff --git a/cmd/suzu/main.go b/cmd/suzu/main.go
index 041e14d..3263d73 100644
--- a/cmd/suzu/main.go
+++ b/cmd/suzu/main.go
@@ -17,7 +17,7 @@ func main() {
 
 	// bin/suzu -C config.ini
 	configFilePath := flag.String("C", "./config.ini", "設定ファイルへのパス")
-	serviceType := flag.String("service", "aws", fmt.Sprintf("音声文字変換のサービス（%s）", strings.Join(suzu.ServiceHandlers.GetNames([]string{"test", "dump"}), ", ")))
+	serviceType := flag.String("service", "aws", fmt.Sprintf("音声文字変換のサービス（%s）", strings.Join(suzu.ServiceHandlerMakers.GetNames([]string{"test", "dump"}), ", ")))
 	flag.Parse()
 
 	if *showVersion {
diff --git a/handler.go b/handler.go
index 87a8643..8f10cdb 100644
--- a/handler.go
+++ b/handler.go
@@ -38,7 +38,7 @@ func NewSuzuErrorResponse(err error) TranscriptionResult {
 }
 
 func getServiceHandler(serviceType string, config Config, channelID, connectionID string, sampleRate uint32, channelCount uint16, languageCode string, onResultFunc any) (serviceHandlerInterface, error) {
-	handler, err := ServiceHandlers.Get(serviceType)
+	handler, err := ServiceHandlerMakers.Get(serviceType)
 	if err != nil {
 		return nil, err
 	}
diff --git a/packet_dump_handler.go b/packet_dump_handler.go
index 11e44d7..dfa315f 100644
--- a/packet_dump_handler.go
+++ b/packet_dump_handler.go
@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	ServiceHandlers.Register("dump", new(PacketDumpHandler))
+	ServiceHandlerMakers.Register("dump", new(PacketDumpHandlerMaker))
 }
 
 type PacketDumpHandler struct {
@@ -27,7 +27,9 @@ type PacketDumpHandler struct {
 	OnResultFunc func(context.Context, io.WriteCloser, string, string, string, any) error
 }
 
-func (h *PacketDumpHandler) New(config Config, channelID, connectionID string, sampleRate uint32, channelCount uint16, languageCode string, onResultFunc any) serviceHandlerInterface {
+type PacketDumpHandlerMaker struct{}
+
+func (h *PacketDumpHandlerMaker) New(config Config, channelID, connectionID string, sampleRate uint32, channelCount uint16, languageCode string, onResultFunc any) serviceHandlerInterface {
 	return &PacketDumpHandler{
 		Config:       config,
 		ChannelID:    channelID,
diff --git a/service_handler.go b/service_handler.go
index 9419ba6..1c198b6 100644
--- a/service_handler.go
+++ b/service_handler.go
@@ -9,45 +9,48 @@ import (
 )
 
 var (
-	ServiceHandlers = NewServiceHandlers()
+	ServiceHandlerMakers = NewServiceHandlerMakers()
 
 	ErrServiceNotFound = fmt.Errorf("SERVICE-NOT-FOUND")
 )
 
+type serviceHandlerMakerInterface interface {
+	New(Config, string, string, uint32, uint16, string, any) serviceHandlerInterface
+}
+
 type serviceHandlerInterface interface {
 	Handle(context.Context, io.Reader) (*io.PipeReader, error)
 	UpdateRetryCount() int
 	GetRetryCount() int
 	ResetRetryCount() int
-	New(Config, string, string, uint32, uint16, string, any) serviceHandlerInterface
 }
 
-type serviceHandlers struct {
-	Handlers map[string]serviceHandlerInterface
+type serviceHandlerMakers struct {
+	Makers map[string]serviceHandlerMakerInterface
 }
 
-func NewServiceHandlers() serviceHandlers {
-	return serviceHandlers{
-		Handlers: make(map[string]serviceHandlerInterface),
+func NewServiceHandlerMakers() serviceHandlerMakers {
+	return serviceHandlerMakers{
+		Makers: make(map[string]serviceHandlerMakerInterface),
 	}
 }
 
-func (h *serviceHandlers) Register(name string, f serviceHandlerInterface) {
-	h.Handlers[name] = f
+func (h *serviceHandlerMakers) Register(name string, f serviceHandlerMakerInterface) {
+	h.Makers[name] = f
 }
 
-func (h *serviceHandlers) Get(name string) (serviceHandlerInterface, error) {
-	handler, ok := h.Handlers[name]
+func (h *serviceHandlerMakers) Get(name string) (serviceHandlerMakerInterface, error) {
+	maker, ok := h.Makers[name]
 	if !ok {
 		return nil, ErrServiceNotFound
 	}
-	return handler, nil
+	return maker, nil
 }
 
-func (h *serviceHandlers) GetNames(exclude []string) []string {
-	handlers := h.Handlers
-	names := make([]string, 0, len(handlers))
-	for name := range handlers {
+func (h *serviceHandlerMakers) GetNames(exclude []string) []string {
+	makers := h.Makers
+	names := make([]string, 0, len(makers))
+	for name := range makers {
 		if slices.Contains(exclude, name) {
 			continue
 		}
diff --git a/speech_to_text_handler.go b/speech_to_text_handler.go
index b120d21..52d62a9 100644
--- a/speech_to_text_handler.go
+++ b/speech_to_text_handler.go
@@ -15,7 +15,7 @@ import (
 )
 
 func init() {
-	ServiceHandlers.Register("gcp", new(SpeechToTextHandler))
+	ServiceHandlerMakers.Register("gcp", new(SpeechToTextHandlerMaker))
 }
 
 type SpeechToTextHandler struct {
@@ -32,7 +32,9 @@ type SpeechToTextHandler struct {
 	OnResultFunc func(context.Context, io.WriteCloser, string, string, string, any) error
 }
 
-func (h *SpeechToTextHandler) New(config Config, channelID, connectionID string, sampleRate uint32, channelCount uint16, languageCode string, onResultFunc any) serviceHandlerInterface {
+type SpeechToTextHandlerMaker struct{}
+
+func (h *SpeechToTextHandlerMaker) New(config Config, channelID, connectionID string, sampleRate uint32, channelCount uint16, languageCode string, onResultFunc any) serviceHandlerInterface {
 	return &SpeechToTextHandler{
 		Config:       config,
 		ChannelID:    channelID,
diff --git a/test_handler.go b/test_handler.go
index f02c148..7807665 100644
--- a/test_handler.go
+++ b/test_handler.go
@@ -11,7 +11,7 @@ import (
 )
 
 func init() {
-	ServiceHandlers.Register("test", new(TestHandler))
+	ServiceHandlerMakers.Register("test", new(TestHandlerMaker))
 }
 
 type TestHandler struct {
@@ -28,7 +28,9 @@ type TestHandler struct {
 	OnResultFunc func(context.Context, io.WriteCloser, string, string, string, any) error
 }
 
-func (h *TestHandler) New(config Config, channelID, connectionID string, sampleRate uint32, channelCount uint16, languageCode string, onResultFunc any) serviceHandlerInterface {
+type TestHandlerMaker struct{}
+
+func (h *TestHandlerMaker) New(config Config, channelID, connectionID string, sampleRate uint32, channelCount uint16, languageCode string, onResultFunc any) serviceHandlerInterface {
 	return &TestHandler{
 		Config:       config,
 		ChannelID:    channelID,