A printer 1 comprising, a feed section 3 capable of feeding a print paper having a first sheet 50 and a second sheet 51 laminated to the first sheet 50 through a gap 58, and a print section 5 for printing the print paper, wherein the print section 5 comprises a thermal head 18 and a platen roller 17 being opposed to the thermal head 18, wherein the platen roller 17 comprises a shaft 30 being rotatably supported in a direction perpendicular to a feeding direction of the print paper, a cylindrical body roller 31 disposed to the shaft 30, and a projecting portion 32 protruding outward in a radial direction of the body roller 31 for filling the gap 58 by pressing the print paper.