Platen unit and printer

A platen unit of a printer configured to perform printing while nipping and feeding a linerless label using a thermal head and a platen roller, the platen unit comprising:

• the platen roller;
• a downstream-side wraparound prevention member disposed on a downstream side of a feeding direction of the linerless label with respect to the platen roller, the downstream-side wraparound prevention member being configured to prevent the linerless label from rolling up to the platen roller;
• and
• an upstream-side wraparound prevention member disposed on an upstream side of the feeding direction of the linerless label with respect to the platen roller, the upstream-side wraparound prevention member being configured to prevent the linerless label from rolling up to the platen roller,
• wherein the upstream-side wraparound prevention member and the downstream-side wraparound prevention member are rotatably assembled to a roller shaft of the platen roller independently from each other,
• wherein the platen unit is configured to be attached to and detached from a support member of the printer, and
• wherein the platen roller, the downstream-side wraparound prevention member, and the upstream-side wraparound prevention member are configured to be integrally detached from the printer when the platen unit is detached from the printer.