diff --git a/SMILEBASIC/VM.d b/SMILEBASIC/VM.d
index 75ed204..a2ac9fe 100644
--- a/SMILEBASIC/VM.d
+++ b/SMILEBASIC/VM.d
@@ -110,6 +110,7 @@ class VM
         bp = 0;//globalを実行なのでbaseは0(グローバル変数をスタックに取るようにしない限り)(挙動的にスタックに確保していなさそう)
         for(pc = 0; pc < this.currentSlot.code.length; pc++)
         {
+            processBreakPoint;
             currentSlot.code[pc].execute(this);
         }
         if(stacki != 0)
@@ -126,10 +127,20 @@ class VM
         this.petitcomputer = petitcomputer;
         bp = 0;//globalを実行なのでbaseは0(グローバル変数をスタックに取るようにしない限り)(挙動的にスタックに確保していなさそう)
     }
+    void processBreakPoint()
+    {
+        if (currentSlot.debugInfo.location[pc].isBreakPoint)
+        {
+            //TODO:まともにする
+            writefln("break point\nslot:%d,pc:%d,line:%d", currentSlotNumber, pc, currentSlot.debugInfo.location[pc].location.line);
+            readln();
+        }
+    }
     bool runStep()
     {
         if(pc < this.currentSlot.code.length)
         {
+            processBreakPoint;
             currentSlot.code[pc].execute(this);
             pc++;
             return true;
diff --git a/SMILEBASIC/compiler.d b/SMILEBASIC/compiler.d
index 2cad417..b3f38f8 100644
--- a/SMILEBASIC/compiler.d
+++ b/SMILEBASIC/compiler.d
@@ -6,25 +6,43 @@ import otya.smilebasic.type;
 import otya.smilebasic.error;
 import otya.smilebasic.systemvariable;
 import std.stdio;
+struct DebugData
+{
+    SourceLocation location;
+    bool isBreakPoint;
+}
 class DebugInfo
 {
     sizediff_t old;
-    std.container.Array!SourceLocation location;
+    std.container.Array!DebugData location;
+    std.container.Array!int line;
     this()
     {
     }
     void addLocation(SourceLocation loc, Code[] code)
     {
+        while (line.length < loc.line)
+        {
+            line ~= location.length;
+        }
         for(int i = 0; i < code.length - old; i++)
         {
-            location ~= loc;
+            location ~= DebugData (loc, false);
         }
         old = location.length;
     }
     SourceLocation getLocationByAddress(int addr)
     {
         if(location.length <= addr) return SourceLocation(0, 0, 0);
-        return location[addr];
+        return location[addr].location;
+    }
+    void setBreakPoint(int line)
+    {
+        location[this.line[line - 1]].isBreakPoint = true;
+    }
+    bool isBreakPoint(int line)
+    {
+        return location[this.line[line - 1]].isBreakPoint;
     }
 }
 class Scope