A portable printer includes: a housing; a platen roller configured to convey a label sheet having a base sheet; a pinch roller configured to rotate following the platen roller via the base sheet; a supporting shaft configured to support the pinch roller; a shaft holder configured to hold the supporting shaft; a removing and inserting section configured to hold the shaft holder to be removable therefrom and insertable thereinto; a pawl section provided in the shaft holder, configured to resiliently hook to the removing and inserting section; a member holding section provided in the housing; and an urging member detachably attachable to the member holding section, nipped by the member holding section and the supporting shaft, and configured to apply pressing force on the platen roller to the pinch roller.