In order to reliably and promptly release bite of a fixed blade and a movable blade with a simple manipulation without being influenced by a state of paper jam of a recording sheet, provided is a printer capable of performing printing on a recording sheet and then cutting the same, including: a fixed blade (11); a movable blade (30); a movable blade drive system (31) including a rack (40) attached to the movable blade, and a rack gear (42) which gears with the rack, rotates in accordance with rotation of a drive gear (41) coupled to a forward/reverse rotatable motor, and linearly moves the rack; a manipulatable lever portion (32); a cooperative mechanism (13) including a pushing portion (12) for moving the fixed blade in a direction of moving away from the movable blade in conjunction with manipulation of the lever portion, and for releasing a contacting pressure of both the blades; a first unit mainly incorporating the fixed blade and the cooperative mechanism; and a second unit (4) mainly incorporating the movable blade and the movable blade drive system, in which one of both the units is separable from another unit, and combination is released.