diff --git a/SMILEBASIC/node.d b/SMILEBASIC/node.d
index 30df341..cd3874f 100644
--- a/SMILEBASIC/node.d
+++ b/SMILEBASIC/node.d
@@ -35,6 +35,7 @@ enum NodeType
     ArrayAssign,
     DefineFunction,
     While,
+    Inc,
 }
 abstract class Node
 {
@@ -420,3 +421,13 @@ class While : Statement
         this.statements = statements;
     }
 }
+class Inc : Statement
+{
+    wstring name;
+    Expression expression;
+    this(wstring name, Expression expr)
+    {
+        this.name = name;
+        this.expression = expr;
+    }
+}
diff --git a/SMILEBASIC/parser.d b/SMILEBASIC/parser.d
index c48a4cc..47e3673 100644
--- a/SMILEBASIC/parser.d
+++ b/SMILEBASIC/parser.d
@@ -62,6 +62,8 @@ class Lexical
         reserved["OUT"] = TokenType.Out;
         reserved["WHILE"] = TokenType.While;
         reserved["WEND"] = TokenType.WEnd;
+        reserved["INC"] = TokenType.Inc;
+        reserved["DEC"] = TokenType.Dec;
         reserved.rehash();
         line = 1;
     }
@@ -756,6 +758,9 @@ class Parser
             case TokenType.While:
                 node = whileStatement();
                 break;
+            case TokenType.Inc:
+            case TokenType.Dec:
+                return incStatement();
             default:
                 syntaxError();
                 break;
@@ -763,6 +768,42 @@ class Parser
         lex.popFront();
         return node;
     }
+    Inc incStatement()
+    {
+        auto token = lex.front();
+        bool dec = token.type == TokenType.Dec;
+        lex.popFront();
+        token = lex.front();
+        if(token.type != TokenType.Iden)
+        {
+            syntaxError();
+            return null;
+        }
+        wstring var = token.value.stringValue;
+        //TODO:Array
+        lex.popFront();
+        token = lex.front();
+        Expression expr;
+        if(token.type == TokenType.Comma)
+        {
+            lex.popFront();
+            expr = expression();
+            if(!expr)
+            {
+                syntaxError();
+                return null;
+            }
+        }
+        else
+        {
+            expr = new Constant(Value(1));
+        }
+        if(dec)
+        {
+            expr = new BinaryOperator(new Constant(Value(0)), TokenType.Minus, expr);
+        }
+        return new Inc(var, expr);
+    }
     IndexExpressions indexExpressions()
     {
         IndexExpressions ie = new IndexExpressions();
diff --git a/SMILEBASIC/petitcomputer.d b/SMILEBASIC/petitcomputer.d
index b7c3c6e..4b27afe 100644
--- a/SMILEBASIC/petitcomputer.d
+++ b/SMILEBASIC/petitcomputer.d
@@ -356,7 +356,7 @@ NEXT
 DEF FACT(N)
  IF N<=1 THEN RETURN 1
  RETURN N*FACT(N-1)
-END"*//*
+END"*/
 `CLS : CL=0 : Z=0
 WHILE 1
   INC Z : IF Z>200 THEN Z=0
@@ -365,7 +365,7 @@ WHILE 1
     PRINT "★ 梅雨で雨が多い季節ですね ★"
   NEXT
   CL=(CL+1) MOD 16 : VSYNC 2
-WEND`*/
+WEND`/*
 `CLS : CL=0
 WHILE 1
 FOR I=0 TO 15
@@ -373,7 +373,7 @@ FOR I=0 TO 15
   PRINT "Ё プチコン3ゴウ Ж"
 NEXT
 CL=(CL+1) MOD 16 : VSYNC 1
-WEND`
+WEND`*/
 /*
 `CLS : CL=0
 @LOOP
diff --git a/SMILEBASIC/token.d b/SMILEBASIC/token.d
index db743f1..9cd38eb 100644
--- a/SMILEBASIC/token.d
+++ b/SMILEBASIC/token.d
@@ -56,6 +56,8 @@ enum TokenType
     Out,
     While,
     WEnd,
+    Inc,
+    Dec,
 }
 
 struct Token