diff --git a/src/main/java/jp/ngt/rtm/block/BlockScaffold.java b/src/main/java/jp/ngt/rtm/block/BlockScaffold.java
index 7e367f60..fe41a775 100644
--- a/src/main/java/jp/ngt/rtm/block/BlockScaffold.java
+++ b/src/main/java/jp/ngt/rtm/block/BlockScaffold.java
@@ -64,10 +64,10 @@ public void addCollisionBoxesToList(World world, int x, int y, int z, AxisAligne
         if (tile instanceof TileEntityScaffold) {
             b0 = ((TileEntityScaffold) tile).getDir() == 0;
         }
-        byte flag0 = BlockScaffold.getConnectionType(world, x + 1, y, z, (byte) 0);
-        byte flag1 = BlockScaffold.getConnectionType(world, x - 1, y, z, (byte) 0);
-        byte flag2 = BlockScaffold.getConnectionType(world, x, y, z + 1, (byte) 1);
-        byte flag3 = BlockScaffold.getConnectionType(world, x, y, z - 1, (byte) 1);
+        byte flag0 = BlockScaffold.getConnectionType(world, x + 1, y, z, tile);
+        byte flag1 = BlockScaffold.getConnectionType(world, x - 1, y, z, tile);
+        byte flag2 = BlockScaffold.getConnectionType(world, x, y, z + 1, tile);
+        byte flag3 = BlockScaffold.getConnectionType(world, x, y, z - 1, tile);
 
         if ((b0 && flag0 == 0) || (!b0 && flag0 == 0 && (flag2 == 1 || flag3 == 1 || flag2 == 3 || flag3 == 3)))//XPos
         {
@@ -115,6 +115,21 @@ public int colorMultiplier(IBlockAccess world, int x, int y, int z) {
         return this.getRenderColor(meta);
     }
 
+
+    /**
+     * @return なし:0,  足場Z:1, 足場X:2, 階段:3, 立方体:4
+     */
+    public static byte getConnectionType(IBlockAccess world, int x, int y, int z, TileEntity tile) {
+        boolean isStairs = tile instanceof TileEntityScaffoldStairs;
+        if (isStairs) {
+            byte stairsDir = ((TileEntityScaffoldStairs) tile).getDir();
+            return getConnectionType(world, x, y, z, stairsDir);
+        } else {
+            return getConnectionType(world, x, y, z);
+        }
+    }
+
+
     /**
      * @return なし:0,  足場Z:1, 足場X:2, 階段:3, 立方体:4
      */
diff --git a/src/main/resources/assets/minecraft/scripts/RenderScaffold.js b/src/main/resources/assets/minecraft/scripts/RenderScaffold.js
index 271e5418..1c617275 100644
--- a/src/main/resources/assets/minecraft/scripts/RenderScaffold.js
+++ b/src/main/resources/assets/minecraft/scripts/RenderScaffold.js
@@ -36,10 +36,10 @@ function render(entity, pass, par3) {
             }
 
             //なし:0, 足場Z:1, 足場X:2, 階段:3, 立方体:4
-            var flag0 = BlockScaffold.getConnectionType(world, x + 1, y, z, 0);
-            var flag1 = BlockScaffold.getConnectionType(world, x - 1, y, z, 0);
-            var flag2 = BlockScaffold.getConnectionType(world, x, y, z + 1, 1);
-            var flag3 = BlockScaffold.getConnectionType(world, x, y, z - 1, 1);
+            var flag0 = BlockScaffold.getConnectionType(world, x + 1, y, z, entity);
+            var flag1 = BlockScaffold.getConnectionType(world, x - 1, y, z, entity);
+            var flag2 = BlockScaffold.getConnectionType(world, x, y, z + 1, entity);
+            var flag3 = BlockScaffold.getConnectionType(world, x, y, z - 1, entity);
             var flagXP = (b0 && flag0 == 0) || (!b0 && flag0 == 0 && (flag2 == 1 || flag3 == 1 || flag2 == 3 || flag3 == 3));
             var flagXN = (b0 && flag1 == 0) || (!b0 && flag1 == 0 && (flag2 == 1 || flag3 == 1 || flag2 == 3 || flag3 == 3));
             var flagZP = (!b0 && flag2 == 0) || (b0 && flag2 == 0 && (flag0 == 2 || flag1 == 2 || flag0 == 3 || flag1 == 3));