A thermal printer comprising: a thermal head and a platen roller configured to perform printing while nipping and feeding a linerless label ; a downstream-side wraparound prevention member disposed on a downstream side of a feeding direction, the downstream-side wraparound prevention member being configured to prevent the linerless label from rolling up to the platen roller ; a fixing portion configured to rotatably support a roller shaft of the platen roller ; and a support member configured to detachably support the fixing portion , wherein the downstream-side wraparound prevention member is assembled with the fixing portion fixedly in a rotational direction of the roller shaft , characterized in that the thermal printer (1 a) further comprises: an upstream-side wraparound prevention member disposed on an upstream side of the feeding direction, 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 is assembled rotatably with respect to the roller shaft ; the downstream-side wraparound prevention member and the upstream-side wraparound prevention member are provided with a restriction mechanism ; and the restriction mechanism is configured to restrict relative rotation of the upstream-side wraparound prevention member with respect to the downstream-side wraparound prevention member . a thermal head and a platen roller configured to perform printing while nipping and feeding a linerless label ; a downstream-side wraparound prevention member disposed on a downstream side of a feeding direction, the downstream-side wraparound prevention member being configured to prevent the linerless label from rolling up to the platen roller ; a fixing portion configured to rotatably support a roller shaft of the platen roller ; and a support member configured to detachably support the fixing portion , wherein the downstream-side wraparound prevention member is assembled with the fixing portion fixedly in a rotational direction of the roller shaft , characterized in that the thermal printer (1 a) further comprises: an upstream-side wraparound prevention member disposed on an upstream side of the feeding direction, 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 is assembled rotatably with respect to the roller shaft ; the downstream-side wraparound prevention member and the upstream-side wraparound prevention member are provided with a restriction mechanism ; and the restriction mechanism is configured to restrict relative rotation of the upstream-side wraparound prevention member with respect to the downstream-side wraparound prevention member . an upstream-side wraparound prevention member disposed on an upstream side of the feeding direction, 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 is assembled rotatably with respect to the roller shaft ; the downstream-side wraparound prevention member and the upstream-side wraparound prevention member are provided with a restriction mechanism ; and the restriction mechanism is configured to restrict relative rotation of the upstream-side wraparound prevention member with respect to the downstream-side wraparound prevention member . <EOS>