To provide a simple peeling device which reliably operates irrespective of its being free of maintenance.

A peeling device comprises a trigger-forming part for forming a raised part at the edge of a protective film stuck on the surface of a board 200 as the base material for producing a printed board, and a peeling part arranged in front of the trigger-forming part for peeling the protective film with the raised part employed as a trigger. The trigger-forming part comprises a feed path along which the material board 200 is fed, oscillating mounts 20 supported on a support beam 11 arranged at the forward end of the feed path so as to oscillate in parallel with the feed direction of the feed path by a first drive, support mounts integrated with the oscillating mounts 20 so as to slides relative thereto by a second drive, disk-like circular cutters 30 turnably journalled to the tips of the support mounts, and vertically movable support mounts 25 retractively arranged on the sides opposed to the circular cutters 30 with respect to the path line L of the feed path for supporting the material board 200 at the sides opposed to those facing the circular cutters 30.