diff --git a/SMILEBASIC/builtinfunctions.d b/SMILEBASIC/builtinfunctions.d
index a403b69..433698f 100644
--- a/SMILEBASIC/builtinfunctions.d
+++ b/SMILEBASIC/builtinfunctions.d
@@ -2739,54 +2739,84 @@ class BuiltinFunction
         }
         throw new IllegalFunctionCall("LOAD");
     }
-    @BasicName("LOAD")
-    static void LOAD2(PetitComputer p, wstring name, DefaultValue!(int, false) flag)
+    //LOAD"TXT:HOGE",ARRAY Type mismatch(LOAD:2)
+    //LOAD"TXT:HOGE",STR$ Type mismatch(LOAD:2)
+    //LOAD"DAT:HOGE",STR$ Type mismatch(LOAD:2)
+    static void LOAD(PetitComputer p, wstring name)
     {
-        import otya.smilebasic.project;
-        flag.setDefaultValue(0);
-        auto type = Projects.splitResourceName(name);
-        wstring txt;
-        wstring resname = type[0].toUpper;
-        wstring projectname = type[1];
-        wstring filename = type[2];
-        if (!Projects.isValidFileName(filename))
+        LOAD(p, name, Value(0));
+    }
+    static void LOAD(PetitComputer p, wstring name, Value data)
+    {
+        void LOAD2(PetitComputer p, wstring name, int flag)
         {
-            throw new IllegalFunctionCall("LOAD");
-        }
-        if(projectname != "" && projectname.toUpper != "SYS")
-        {
-            throw new IllegalFunctionCall("LOAD");
-        }
-        if(projectname == "")
-        {
-            projectname = p.project.currentProject;
-        }
-        if(resname == "" || resname.indexOf("PRG") == 0)
-        {
-            int lot = 0/*always 0...?*/;
-            if(resname != "" && resname != "PRG")
+            import otya.smilebasic.project;
+            auto type = Projects.splitResourceName(name);
+            wstring txt;
+            wstring resname = type[0].toUpper;
+            wstring projectname = type[1];
+            wstring filename = type[2];
+            if (!Projects.isValidFileName(filename))
             {
-                auto num = resname[3..$];
-                lot = num.to!int;
+                throw new IllegalFunctionCall("LOAD");
             }
-            if(!p.project.loadFile(projectname, "TXT", filename, txt))
+            if(projectname != "" && projectname.toUpper != "SYS")
             {
-                //not exist
+                throw new IllegalFunctionCall("LOAD");
+            }
+            if(projectname == "")
+            {
+                projectname = p.project.currentProject;
+            }
+            if(resname == "" || resname.indexOf("PRG") == 0)
+            {
+                int lot = 0/*always 0...?*/;
+                if(resname != "" && resname != "PRG")
+                {
+                    auto num = resname[3..$];
+                    lot = num.to!int;
+                }
+                if(!p.project.loadFile(projectname, "TXT", filename, txt))
+                {
+                    //not exist
+                    return;
+                }
+                p.program.slot[lot].load(filename, txt);
                 return;
             }
-            p.program.slot[lot].load(filename, txt);
+            if(resname.indexOf("GRP") == 0)
+            {
+                throw new IllegalFunctionCall("NOTIMPL:LOAD GRP");
+            }
+            throw new IllegalFunctionCall("LOAD");
+        }
+        if (data.isNumber)
+        {
+            LOAD2(p, name, data.castInteger);
             return;
         }
-        if(resname.indexOf("GRP") == 0)
-        {
-            throw new IllegalFunctionCall("NOTIMPL:LOAD GRP");
-        }
-        throw new IllegalFunctionCall("LOAD");
+        LOAD(p, name, data, 0);
     }
-    static void LOAD(wstring name, Value arr, DefaultValue!(int, false) flag)
+    static void LOAD(PetitComputer p, wstring name, Value data, int flag)
     {
-        flag.setDefaultValue(0);
-        throw new IllegalFunctionCall("NOTIMPL:LOAD");
+        auto file = Projects.parseFileName(name);
+        if (file.resource != Resource.data)
+        {
+            throw new IllegalFunctionCall("LOAD", 2);
+        }
+        if (data.isNumberArray)
+        {
+            if (data.type == ValueType.IntegerArray)
+                p.project.loadDataFile(file, data.integerArray);
+            else if (data.type == ValueType.DoubleArray)
+                p.project.loadDataFile(file, data.doubleArray);
+            else
+                throw new TypeMismatch("LOAD", 2);
+        }
+        else
+        {
+            throw new TypeMismatch("LOAD", 2);
+        }
     }
     static void SAVE(PetitComputer p, wstring name)
     {
diff --git a/SMILEBASIC/project.d b/SMILEBASIC/project.d
index ef99dd9..34a483b 100644
--- a/SMILEBASIC/project.d
+++ b/SMILEBASIC/project.d
@@ -178,6 +178,76 @@ r"ファイルを書き込みます。
         return true;
     }
 
+    bool loadDataFile(T)(FileName file, ref Array!T contents)
+        if (is(T == int) || is(T == double))
+    {
+        wstring project;
+        result = DialogResult.FAILURE;
+        if (file.project.empty)
+            project = convertProjectName(currentProject);
+        else
+        {
+            project = file.project;
+            if (!isValidProjectName(project))
+                throw new IllegalFunctionCall("LOAD");
+        }
+        if (!isValidFilename(file.name))
+            throw new IllegalFunctionCall("LOAD");
+        auto path = buildPath(projectPath, project, "DAT"w, file.name).to!string;
+
+        //show dialog
+        result = DialogResult.SUCCESS;
+        import std.stdio;
+        import std.algorithm;
+        File f = File(path, "rb");
+        DataHeader[1] harray;
+        f.rawRead(harray);
+        if (harray[0].dimension != contents.dimCount)
+        {
+            throw new TypeMismatch("LOAD");
+        }
+        auto dim = harray[0].dim[0..harray[0].dimension];
+        auto len = dim.reduce!((x, y) => x * y);
+        T[] result;
+        if (harray[0].type == DataType.int_)
+        {
+            int[] array = new int[len];
+            f.rawRead(array);
+            static if (!is(T == int))
+            {
+                result = array.map!(x => x.to!T).array;
+            }
+            else
+            {
+                result = array;
+            }
+        }
+        else if (harray[0].type == DataType.double_)
+        {
+            double[] array = new double[len];
+            f.rawRead(array);
+            static if (!is(T == double))
+            {
+                result = array.map!(x => x.to!T).array;
+            }
+            else
+            {
+                result = array;
+            }
+        }
+        else if (harray[0].type == DataType.ushort_)
+        {
+            ushort[] array = new ushort[len];
+            f.rawRead(array);
+            result = array.map!(x => x.to!T).array;
+        }
+        //配列に書き込むというより配列を差し替えている
+        contents.array = result;
+        contents.dim[] = harray[0].dim[];
+        contents.dimCount = harray[0].dimension;
+        return true;
+    }
+
     void saveTextFile(FileName file, wstring content)
     {
         wstring project;
@@ -236,6 +306,8 @@ r"ファイルを書き込みます。
     {
         if (proj.empty)
         {
+            if (currentProject.empty)
+                return "[DEFAULT]";
             return currentProject;
         }
         return proj;