diff --git a/AirBomber/AirBomber/SimpleMap.cs b/AirBomber/AirBomber/SimpleMap.cs
index 63bb878..f5f9a69 100644
--- a/AirBomber/AirBomber/SimpleMap.cs
+++ b/AirBomber/AirBomber/SimpleMap.cs
@@ -16,11 +16,11 @@
 
         protected override void DrawBarrierPart(Graphics g, int i, int j)
         {
-            g.FillRectangle(barrierColor, i * _size_x, j * _size_y, i * (_size_x + 1), j * (_size_y + 1));
+            g.FillRectangle(barrierColor, i * _size_x, j * _size_y, _size_x, _size_y);
         }
         protected override void DrawRoadPart(Graphics g, int i, int j)
         {
-            g.FillRectangle(roadColor, i * _size_x, j * _size_y, i * (_size_x + 1), j * (_size_y + 1));
+            g.FillRectangle(roadColor, i * _size_x, j * _size_y, _size_x, _size_y);
         }
         protected override void GenerateMap()
         {
diff --git a/AirBomber/AirBomber/WallMap.cs b/AirBomber/AirBomber/WallMap.cs
index 8cb7989..59273aa 100644
--- a/AirBomber/AirBomber/WallMap.cs
+++ b/AirBomber/AirBomber/WallMap.cs
@@ -31,7 +31,7 @@ namespace AirBomber
 
         protected override void DrawRoadPart(Graphics g, int i, int j)
         {
-            g.FillRectangle(roadColor, i * _size_x, j * _size_y, (i + 1) * _size_x, (j + 1) * _size_y);
+            g.FillRectangle(roadColor, i * _size_x, j * _size_y, _size_x, _size_y);
         }
 
         protected override void GenerateMap()