The present invention introduces an integrated mag-postcard including a pattern layer as front side, a magnet layer as middle side and a mailing information layer as back side, wherein all three layers are integrated tightly. The integrated mag-postcard has full magnetic effect and ability of sticking on metal surface evenly and freely for a long time without bending or wrinkle. The appearance of present invention is substantially the same as a conventional postcard. Both the pattern layer and the mailing information layer may be readable, printable or writable freely and easily. Furthermore, the magnetic property of present invention still remains after being posted to anywhere in the world.