HEARING AID

This hearing aid comprises a main body case (1), a battery case (7) provided so that it can be pulled from inside the main body case (1) to outside of the main body case (1), a control device (14) that is actuated by electromotive force of an air battery (8) housed in the battery case (7), a microphone (4) and speaker (3) electrically connected to the control device (14), and a switching portion for cutting off power from the air battery (8) to the control device (14) in conjunction with manipulation that pulls at least part of the battery case (7) out of the main body case (1). A magnet (11) that blocks off air holes (10) in the air battery (8) is provided to the bottom part of the (7). The magnet (11) closes off the air holes (10) in conjunction with manipulation that pulls at least part of the battery case (7) out of the main body case (1).