A plate spring is disposed at an outer lateral face of each of a pair of supporting members which a separation mechanism includes. In separation ejection, when an opening and closing cover is closed while pressing parts of an opening and closing cover is in contact with plate springs of the separation mechanism, the separation mechanism is fixed at the separation ejection position and the nip roller of the separation mechanism is biased toward the platen roller because of the effect of the plate springs. Since the plate springs can be pressed by the pressing parts of the opening and closing cover, a component to press the plate springs can be eliminated.