The printer in the exemplary embodiment includes a functional unit Y. The functional unit Y includes: an opening and closing cover 3; a platen roller 10; a thermal head 28, a control board unit 40 and a battery container 33. The functional unit Y is accommodated in a body case. A front cover 5 is fixed to a body case 2. The front cover 5 enables the opening and closing cover 3 to be opened and closed, and protects the functional unit Y.