A printing apparatus performs printing on a sheet including adhesive label paper and includes a thermal head configured to perform printing on the sheet using heat, a platen roller which is positioned to face the thermal head, and configured to rotate to transport the sheet when the sheet is interposed between the thermal head and the platen roller, a heating unit configured to heat the thermal head, an output device, and a controller. The controller is configured to operate in a cleaning mode, in which the controller causes the thermal head to be heated to a predetermined temperature at which glue of the label paper is softened while the platen roller is in contact with the thermal head and rotating without transporting any sheet, and controls the output device to indicate that the thermal head has been heated up to the predetermined temperature and is ready for cleaning.