A printer comprises a linerless label operation mode and a linered label operation mode as operation modes. When a cutter unit is coupled to a coupling portion, a control unit of the printer detects the operation mode of the printer based on whether the cutter unit is a cutter unit configured to cut the linerless label or a cutter unit configured to cut the linered label, and sets the operation mode of the printer to a linerless label operation mode or a linered label operation mode.