To provide a detaching device for securely transferring a molding to a receiving molding die without damaging by installing a vibrator for causing the vibration of a suction face.

After a molding process, a suction face 1a is set to the top force face 30a of a molding die for a molding W remaining in the bottom force 31 of the die, and the air in a cavity 3 is vacuum-decompressed by a vacuum pump through piping 4, and further, the molding W is caused to fit to the suction face 1a by vacuum suction by sucking the air from a small hole 1b. In addition, a detaching device 1 is transferred to a receiving molding die 33, then the molding W is laid along the contour of the receiving face of the die 33, and a vibrator 2 is activated top give a vibration to the suction face 1a. At the same time, the vacuum suction operation of the vacuum pump is suspended, then instead, a pressurizing pump is activated to feed the pressurized air into the cavity 3 through the piping 4, and thereby, the cavity 3 is internally pressurized with the air. Consequently, the pressurized air is blown to the suction face 1a side from the small hole 1b to force the molding W to be released from the molding die and the molding W is transferred to the receiving molding die 33.