diff --git a/FileSocket/receiver.c b/FileSocket/receiver.c
index 10318390bc539a80999e4dd3446143480aad3e68..30358110a70d72fde983fca6bbb3725f41ff4034 100644
--- a/FileSocket/receiver.c
+++ b/FileSocket/receiver.c
@@ -18,22 +18,22 @@
 #include <unistd.h>
 #define BUFSIZE 1024
 
-int socket_open(int socket_fd);
-struct sockaddr_in socket_connect(int socket_fd, struct sockaddr_in server_addr);
-void file_receive(int socket_fd);
+int SocketOpen(int socket_fd);
+struct sockaddr_in SocketConnect(int socket_fd, struct sockaddr_in server_addr);
+void FileReceive(int socket_fd);
 
 void main() {
     int socket_fd;
     struct sockaddr_in server_addr;
 
-    socket_fd = socket_open(socket_fd);
-    server_addr = socket_connect(socket_fd, server_addr);
-    file_receive(socket_fd);
+    socket_fd = SocketOpen(socket_fd);
+    server_addr = SocketConnect(socket_fd, server_addr);
+    FileReceive(socket_fd);
     close(socket_fd);
 }
 
 // client socket 생성
-int socket_open(int socket_fd) {
+int SocketOpen(int socket_fd) {
     if ((socket_fd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
         perror("socket open error.");
         exit(1);
@@ -42,7 +42,7 @@ int socket_open(int socket_fd) {
 }
 
 // client가 server 소켓에 연결 요청
-struct sockaddr_in socket_connect(int socket_fd, struct sockaddr_in server_addr) {
+struct sockaddr_in SocketConnect(int socket_fd, struct sockaddr_in server_addr) {
     memset(&server_addr, 0, sizeof(server_addr));
     server_addr.sin_family = AF_INET;
     server_addr.sin_addr.s_addr = inet_addr("192.168.56.101");
@@ -57,7 +57,7 @@ struct sockaddr_in socket_connect(int socket_fd, struct sockaddr_in server_addr)
 }
 
 // server로 부터 파일 전송 받음
-void file_receive(int socket_fd) {
+void FileReceive(int socket_fd) {
     FILE* receive_fp;
     char send_buf[BUFSIZE] = { '\0', };
     char receive_buf[BUFSIZE] = { '\0', };