To surely regulate a careless opening operation of an auxiliary cover in a bench type cutter for cutting a material to be cut by moving a cutter body downward, by solving the problem that the careless opening operation of an auxiliary cover is not sufficiently regulated in a case of a structure to cover a part of the auxiliary cover of a blade point not covered with a fixed cover and a movable cover, as a result of allowing a lower end portion of the fixed cover to escape upward for securing a great cutting depth.

An opening operation of an auxiliary cover 80 is inhibited in a state where the cutter body 10 is positioned at an upper standby position by engaging with a link lever 23 for opening/closing a movable cover 14 in association with a vertical movement of a cutter body 10.