To provide a pasting device capable of changing dimensions of pasting by a simple structure, without complicated work such as exchanging a pressing member.

The pasting device presses a part of a paste sheet 121 attached with paste on one side on paper to transfer the paste. The pasting device has a pressure receiving surface 35 disposed oppositely to a pasting position of the paper, and a pasting head 126 having a plurality of pressing surfaces which can be disposed oppositely to the pressure receiving surface 35. The pressing surfaces of the pasting head 126 is switched by a switching mechanism, and press-contacting length in a pasting sheet feeding direction between the pressing surfaces and the pressure receiving surface 35 can be switched into plural stages.