A mobile terminal apparatus including an operation lock mode setting unit that sets an operation lock mode; an event container display control unit that displays, when a predetermined event occurs, an event container indicating the occurred predetermined event on a display unit; an event container display change control unit that sets an event container between an active state and an inactive state; a lock canceling operation unit that cancels the operation lock mode; and a canceling operation handling control unit that, when an active-state event container is displayed on the display unit and the operation lock mode is canceled, performs automatic activation and display of an application program corresponding to the event of the active-state event container, and when all event containers on the display unit are in the inactive state and the operation lock mode is canceled, displays a predetermined display screen on the display unit.