When an automatic clearing function for resetting is executed in the case of no operation for a certain period of time, without occurrence of automatic clearing complicatedly and by executing automatic clearing appropriately, it is enabled to satisfy both improvement of usability by a user and convenience by automatic clearing. A control portion, when setting for a plurality of setting items is performed in accordance with operation input to the operation portion, measures time during which operation input to performing setting is not performed for each of the plurality of setting items, and executes automatic clearing to reset setting based on the measured time. When performing resetting for a setting item for which automatic clearing is executed during setting by a user, the time until executing automatic clearing is then extended.