A sheet-shaped substance is separated surely over the entire surface with a simple configuration. Provided is a sheet pasting device (1) including: an elastically-deformable sheet support section (2) that is provided with a flat surface (2a), and supports a sheet-shaped substance (A) in a state in which the sheet-shaped substance (A) is pasted to the surface (2a) an extrusion member (3) that is provided so as to be able to protrude from and retract into the surface (2a) of the sheet support section (2) and a drive mechanism (4) that causes the extrusion member (3) to protrude from and retract into the surface (2a).
