diff --git a/binding-mruby/binding-util.h b/binding-mruby/binding-util.h
index 6584026..d7c92da 100644
--- a/binding-mruby/binding-util.h
+++ b/binding-mruby/binding-util.h
@@ -22,6 +22,8 @@
 #ifndef BINDINGUTIL_H
 #define BINDINGUTIL_H
 
+#include "exception.h"
+
 #include <mruby.h>
 #include <mruby/data.h>
 #include <mruby/variable.h>
@@ -212,15 +214,16 @@ defineClass(mrb_state *mrb, const char *name)
 #define DEF_PROP_B(Klass, PropName) \
 	DEF_PROP(Klass, mrb_bool, PropName, "b", bool)
 
-// FIXME: use initialize_copy
-#define CLONE_FUN(Klass) \
-	MRB_METHOD(Klass##Clone) \
+#define INITCOPY_FUN(Klass) \
+	MRB_METHOD(Klass##InitializeCopy) \
 	{ \
-		Klass *k = getPrivateData<Klass>(mrb, self); \
-		mrb_value dupObj = mrb_obj_clone(mrb, self); \
-		Klass *dupK = new Klass(*k); \
-		setPrivateData(dupObj, dupK, Klass##Type); \
-		return dupObj; \
+		mrb_value origObj; \
+		mrb_get_args(mrb, "o", &origObj); \
+		Klass *orig = getPrivateData<Klass>(mrb, origObj); \
+		Klass *k = 0; \
+		GUARD_EXC( k = new Klass(*orig); ) \
+		setPrivateData(self, k, Klass##Type); \
+		return self; \
 	}
 
 #define MARSH_LOAD_FUN(Klass) \
diff --git a/binding-mruby/bitmap-binding.cpp b/binding-mruby/bitmap-binding.cpp
index f6dd714..57a4db9 100644
--- a/binding-mruby/bitmap-binding.cpp
+++ b/binding-mruby/bitmap-binding.cpp
@@ -297,7 +297,7 @@ MRB_METHOD(bitmapSetFont)
 	return mrb_nil_value();
 }
 
-CLONE_FUN(Bitmap)
+INITCOPY_FUN(Bitmap)
 
 
 void
@@ -307,7 +307,8 @@ bitmapBindingInit(mrb_state *mrb)
 
 	disposableBindingInit<Bitmap>(mrb, klass);
 
-	mrb_define_method(mrb, klass, "initialize",  bitmapInitialize, MRB_ARGS_REQ(1) | MRB_ARGS_OPT(1));
+	mrb_define_method(mrb, klass, "initialize",      bitmapInitialize,     MRB_ARGS_REQ(1) | MRB_ARGS_OPT(1));
+	mrb_define_method(mrb, klass, "initialize_copy", BitmapInitializeCopy, MRB_ARGS_REQ(1));
 
 	mrb_define_method(mrb, klass, "width",       bitmapWidth,      MRB_ARGS_NONE());
 	mrb_define_method(mrb, klass, "height",      bitmapHeight,     MRB_ARGS_NONE());
@@ -326,5 +327,4 @@ bitmapBindingInit(mrb_state *mrb)
 	mrb_define_method(mrb, klass, "font=",       bitmapSetFont,    MRB_ARGS_REQ(1));
 
 	mrb_define_method(mrb, klass, "inspect",     inspectObject,    MRB_ARGS_NONE());
-	mrb_define_method(mrb, klass, "clone",       BitmapClone,      MRB_ARGS_NONE());
 }
diff --git a/binding-mruby/etc-binding.cpp b/binding-mruby/etc-binding.cpp
index bf571e8..82c303a 100644
--- a/binding-mruby/etc-binding.cpp
+++ b/binding-mruby/etc-binding.cpp
@@ -159,9 +159,9 @@ MARSH_LOAD_FUN(Color)
 MARSH_LOAD_FUN(Tone)
 MARSH_LOAD_FUN(Rect)
 
-CLONE_FUN(Tone)
-CLONE_FUN(Color)
-CLONE_FUN(Rect)
+INITCOPY_FUN(Tone)
+INITCOPY_FUN(Color)
+INITCOPY_FUN(Rect)
 
 #define MRB_ATTR_R(Class, Attr, sym) mrb_define_method(mrb, klass, sym, Class##Get##Attr, MRB_ARGS_NONE())
 #define MRB_ATTR_W(Class, Attr, sym) mrb_define_method(mrb, klass, sym "=", Class##Set##Attr, MRB_ARGS_REQ(1))
@@ -173,8 +173,8 @@ CLONE_FUN(Rect)
 	mrb_define_class_method(mrb, klass, "_load", Klass##Load, MRB_ARGS_REQ(1)); \
 	serializableBindingInit<Klass>(mrb, klass); \
 	mrb_define_method(mrb, klass, "initialize", Klass##Initialize, MRB_ARGS_REQ(3) | MRB_ARGS_OPT(1)); \
+	mrb_define_method(mrb, klass, "initialize_copy", Klass##InitializeCopy, MRB_ARGS_REQ(1)); \
 	mrb_define_method(mrb, klass, "set", Klass##Set, MRB_ARGS_REQ(3) | MRB_ARGS_OPT(1)); \
-	mrb_define_method(mrb, klass, "clone", Klass##Clone, MRB_ARGS_NONE()); \
 	mrb_define_method(mrb, klass, "==", Klass##Equal, MRB_ARGS_REQ(1)); \
 	mrb_define_method(mrb, klass, "to_s", Klass##Stringify, MRB_ARGS_NONE()); \
 	mrb_define_method(mrb, klass, "inspect", Klass##Stringify, MRB_ARGS_NONE()); \
diff --git a/binding-mruby/font-binding.cpp b/binding-mruby/font-binding.cpp
index 5d921d8..e06b882 100644
--- a/binding-mruby/font-binding.cpp
+++ b/binding-mruby/font-binding.cpp
@@ -59,6 +59,22 @@ MRB_METHOD(fontInitialize)
 	return self;
 }
 
+MRB_METHOD(fontInitializeCopy)
+{
+	mrb_value origObj;
+	mrb_get_args(mrb, "o", &origObj);
+
+	Font *orig = getPrivateData<Font>(mrb, origObj);
+	Font *f = new Font(*orig);
+	setPrivateData(self, f, FontType);
+
+	/* Wrap property objects */
+	f->setColor(new Color(*f->getColor()));
+	wrapProperty(mrb, self, f->getColor(), CScolor, ColorType);
+
+	return self;
+}
+
 MRB_METHOD(FontGetName)
 {
 	Font *f = getPrivateData<Font>(mrb, self);
@@ -157,7 +173,8 @@ fontBindingInit(mrb_state *mrb)
 	INIT_KLASS_PROP_BIND(Font, DefaultItalic, "default_italic");
 	INIT_KLASS_PROP_BIND(Font, DefaultColor, "default_color");
 
-	mrb_define_method(mrb, klass, "initialize", fontInitialize, MRB_ARGS_OPT(2));
+	mrb_define_method(mrb, klass, "initialize",      fontInitialize,     MRB_ARGS_OPT(2));
+	mrb_define_method(mrb, klass, "initialize_copy", fontInitializeCopy, MRB_ARGS_REQ(1));
 
 	INIT_PROP_BIND(Font, Name, "name");
 	INIT_PROP_BIND(Font, Size, "size");
diff --git a/binding-mruby/table-binding.cpp b/binding-mruby/table-binding.cpp
index 4dd4e6a..699c41e 100644
--- a/binding-mruby/table-binding.cpp
+++ b/binding-mruby/table-binding.cpp
@@ -141,6 +141,7 @@ MRB_METHOD(tableSetAt)
 }
 
 MARSH_LOAD_FUN(Table)
+INITCOPY_FUN(Table)
 
 void
 tableBindingInit(mrb_state *mrb)
@@ -150,7 +151,9 @@ tableBindingInit(mrb_state *mrb)
 	mrb_define_class_method(mrb, klass, "_load", TableLoad, MRB_ARGS_REQ(1));
 	serializableBindingInit<Table>(mrb, klass);
 
-	mrb_define_method(mrb, klass, "initialize", tableInitialize, MRB_ARGS_REQ(1) | MRB_ARGS_OPT(2));
+	mrb_define_method(mrb, klass, "initialize",      tableInitialize,     MRB_ARGS_REQ(1) | MRB_ARGS_OPT(2));
+	mrb_define_method(mrb, klass, "initialize_copy", TableInitializeCopy, MRB_ARGS_REQ(1));
+
 	mrb_define_method(mrb, klass, "resize",     tableResize,     MRB_ARGS_REQ(1) | MRB_ARGS_OPT(2));
 	mrb_define_method(mrb, klass, "xsize",      tableXSize,      MRB_ARGS_NONE()                  );
 	mrb_define_method(mrb, klass, "ysize",      tableYSize,      MRB_ARGS_NONE()                  );