To provide a coupled stamper allowing easy release of a coupled state of firmly coupled stampers.

This coupled stamper 1 includes engagement protrusions 15 in one prescribed face orthogonal to a stamper face 11, and includes engagement grooves in the rear face of the face having the engagement protrusions 15. The coupled stamper 1 includes a coupling release assistant mechanism 50 (press plates 32) forming a gap for facilitating the release of the coupled state, so that the respective coupled stampers in the coupled state in which the coupled stampers are firmly engaged can be easily separated.