diff --git a/MP4/box_mfhd.cpp b/MP4/box_mfhd.cpp
new file mode 100644
index 00000000..79639505
--- /dev/null
+++ b/MP4/box_mfhd.cpp
@@ -0,0 +1,27 @@
+#include "box_mfhd.h"
+
+Box_mfhd::Box_mfhd( ) {
+  Container = new Box( 0x6D666864 );
+  SetDefaults( );
+  SetReserved( )
+}
+
+Box_mfhd::~Box_mfhd() {
+  delete Container;
+}
+
+Box * Box_mfhd::GetBox() {
+  return Container;
+}
+
+void Box_mfhd::SetDefaults( ) {
+  SetSequenceNumber( );
+}
+
+void Box_mfhd::SetDefaults( ) {
+  Container->SetPayload((uint32_t)4,Box::uint32_to_uint8(0));
+}
+
+void SetSequenceNumber( uint32_t SequenceNumber );
+  Container->SetPayload((uint32_t)4,Box::uint32_to_uint8(SequenceNumber),4);
+}
diff --git a/MP4/box_mfhd.h b/MP4/box_mfhd.h
new file mode 100644
index 00000000..f33bef0c
--- /dev/null
+++ b/MP4/box_mfhd.h
@@ -0,0 +1,14 @@
+#include "box.h"
+
+class Box_mfhd {
+  public:
+    Box_mfhd( );
+    ~Box_mfhd();
+    Box * GetBox();
+    void SetSequenceNumber( uint32_t SequenceNumber = 1 );
+  private:
+    void SetDefaults( );
+    void SetReserved( );
+    Box * Container;
+};//Box_ftyp Class
+