A data processing apparatus includes a manipulation member, a protection cover, a latch member, a coupling device, and a control unit. The protection cover covers a removable recording medium attached to the data processing apparatus. The latch member engages the protection cover to set the protection cover in a closed condition. The coupling device couples or uncouples the manipulation member and the latch member. The control unit controls a coupling condition of the manipulation member and the latch member. The control unit selectively transmits a first signal for coupling the manipulation member and the latch member and a second signal for uncoupling the manipulation member and the latch member depending on whether or not data processing for the removable recording medium is in progress.