diff --git a/src/j3/Telnet.java b/src/j3/Telnet.java
index 5b6b4be..cfcd88e 100644
--- a/src/j3/Telnet.java
+++ b/src/j3/Telnet.java
@@ -1,5 +1,6 @@
 package j3;
 
+import java.io.BufferedInputStream;
 import java.io.DataInputStream;
 import java.io.OutputStream;
 import java.net.Socket;
@@ -18,7 +19,7 @@
 		try{
 			socket = new Socket(args[0], Integer.parseInt(args[1])) ;
 			outstr = socket.getOutputStream() ; //サーバへの送信用
-			din = new DataInputStream(socket.getInputStream()) ;
+			din = new DataInputStream(new BufferedInputStream(socket.getInputStream())) ;
 		} catch (Exception e) {
 			System.err.println("Network error.") ;
 			System.exit(1) ;