To provide a platen roller for a printer capable of uniformly applying pressure suitable for performing printing on print paper having a first sheet, and a second sheet superposed on the first sheet with a gap by a simple configuration.

The platen roller 17 for the printer that nips and feeds the print paper having a first sheet 50 and a second sheet 51 superposed on the first sheet 50 with a gap with the paper pressed to a thermal head 18 includes a shaft 30 supported to rotate in a direction intersecting with a feeding direction of the print paper, a columnar body roller 31 disposed on the shaft 30, and a protrusion 32 protruding in a radially outward direction of the body roller 31 to press the print paper to bring the gap in the print paper into an almost filled state.