diff --git a/server.go b/server.go
index 45be448..f441da4 100644
--- a/server.go
+++ b/server.go
@@ -53,6 +53,8 @@ func NewRelayServer(cfg Config) (http.Handler, error) {
 }
 
 func (s *RelayServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	s.printRequest(r)
+
 	switch r.URL.Path {
 	case "", "/":
 		uid, err := s.readUserID(r)
@@ -74,6 +76,21 @@ func (s *RelayServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
+func (s *RelayServer) printRequest(r *http.Request) {
+	log.Println("--- request start ---")
+	log.Println("path:")
+	log.Println(r.URL)
+	log.Println("headers:")
+	for k := range r.Header {
+		log.Println(k, "=", r.Header.Get(k))
+	}
+	log.Println("cookies:")
+	for _, c := range r.Cookies() {
+		log.Println(c.String())
+	}
+	log.Println("--- request end ---")
+}
+
 func (s *RelayServer) redirect(w http.ResponseWriter, loc string) {
 	nr, err := http.NewRequest(http.MethodGet, loc, nil)
 	if err != nil {