diff --git a/SMILEBASIC/VM.d b/SMILEBASIC/VM.d
index c780e0d..00e4e07 100644
--- a/SMILEBASIC/VM.d
+++ b/SMILEBASIC/VM.d
@@ -43,6 +43,7 @@ enum CodeType
     Goto,
     Gosub,
     Print,
+    PopG,
 }
 abstract class Code
 {
@@ -108,6 +109,19 @@ class PushG : Code
         vm.push(vm.global[var]);
     }
 }
+class PopG : Code
+{
+    int var;
+    this(int var)
+    {
+        this.type = CodeType.PopG;
+        this.var = var;
+    }
+    override void execute(VM vm)
+    {
+        vm.pop(vm.global[var]);
+    }
+}
 class Operate : Code
 {
     TokenType operator;
diff --git a/SMILEBASIC/compiler.d b/SMILEBASIC/compiler.d
index 1bcd5cd..0642587 100644
--- a/SMILEBASIC/compiler.d
+++ b/SMILEBASIC/compiler.d
@@ -24,10 +24,38 @@ class Compiler
     {
         code ~= new PushG(ind);
     }
+    void genCodePopGlobal(int ind)
+    {
+        code ~= new PopG(ind);
+    }
     void genCodeOP(TokenType op)
     {
         code ~= new Operate(op);
     }
+    int defineGlobalVarIndex(wstring name)
+    {
+        int global = this.global.get(name, 0);
+        if(global == 0)
+        {
+            this.global[name] = ++globalIndex = global;
+        }
+        else
+        {
+            //error:二重定義
+        }
+        return global;
+    }
+    int getGlobalVarIndex(wstring name)
+    {
+        int global = this.global.get(name, 0);
+        if(global == 0)
+        {
+            //local変数をあたる
+            //それでもだめならOPTION STRICTならエラー
+            this.global[name] = ++globalIndex = global;
+        }
+        return global;
+    }
     void compileExpression(Expression exp)
     {
 
@@ -46,14 +74,7 @@ class Compiler
                 break;
             case NodeType.Variable:
                 auto var = cast(Variable)exp;
-                int global = this.global.get(var.name, 0);
-                if(global == 0)
-                {
-                    //local変数をあたる
-                    //それでもだめならOPTION STRICTならエラー
-                    this.global[var.name] = ++globalIndex = global;
-                }
-                genCodePushGlobal(global);
+                genCodePushGlobal(getGlobalVarIndex(var.name));
                 break;
             case NodeType.CallFunction:
                 {
@@ -100,6 +121,13 @@ class Compiler
                         code ~= new PrintCode(print.args.length);
                     }
                     break;
+                case NodeType.Assign:
+                    {
+                        auto assign = cast(Assign)i;
+                        compileExpression(assign.expression);
+                        genCodePopGlobal(getGlobalVarIndex(assign.name));
+                    }
+                    break;
                 default:
                     stderr.writeln("Compile:NotImpl ", i.type);
             }
diff --git a/SMILEBASIC/main.d b/SMILEBASIC/main.d
index eb91f41..4a7e94f 100644
--- a/SMILEBASIC/main.d
+++ b/SMILEBASIC/main.d
@@ -8,7 +8,7 @@ int main(string[] argv)
         writeln(parser.calc());
     }
 
-    auto parser = new Parser("A=1\nPRINT 1+1,2+3;10-5,A");
+    auto parser = new Parser("A=1+2+3+4\nPRINT 1+1,2+3;10-5,A");
     auto vm = parser.compile();
     vm.run();
     readln();
diff --git a/SMILEBASIC/node.d b/SMILEBASIC/node.d
index 77d267b..79dbc94 100644
--- a/SMILEBASIC/node.d
+++ b/SMILEBASIC/node.d
@@ -163,11 +163,11 @@ class Print : Statement
 class Assign : Statement
 {
     wstring name;
-    Expression expr;
+    Expression expression;
     this(wstring name, Expression expr)
     {
         this.type = NodeType.Assign;
         this.name = name;
-        this.expr = expr;
+        this.expression = expr;
     }
 }