diff --git a/app/src/main/java/org/ntlab/amaryllis/client/voiceservice/PlayListManager.java b/app/src/main/java/org/ntlab/amaryllis/client/voiceservice/PlayListManager.java
index 95957b0..c8f68ee 100644
--- a/app/src/main/java/org/ntlab/amaryllis/client/voiceservice/PlayListManager.java
+++ b/app/src/main/java/org/ntlab/amaryllis/client/voiceservice/PlayListManager.java
@@ -3,7 +3,7 @@
 import java.util.ArrayList;
 
 public class PlayListManager{
-    int index = 0;
+    int index = -1;
     ArrayList<VoiceMemo> playlist = new ArrayList<>();
     //範囲内にある全てのvoicememoのリストを作成
     public void addVoiceMemos(ArrayList<VoiceMemo> voicememos){
@@ -26,9 +26,8 @@
     //次に聞くvoicememoを渡す
     public ArrayList<VoiceMemo> getUnplayedList(){
         ArrayList<VoiceMemo> unplayedlist = new ArrayList<>();
-        if (index != 0){
-            index++;
-        }
+        next();
+        unplayedlist.clear();
         unplayedlist.add(playlist.get(index));
 //        for(int i = 0;i < unplayedlist.size(); i++) {
 //            boolean exist = false;