In an expendable part installation structure and an imaging apparatus implementing such a structure, both disclosed herein, identification features for identifying an expendable part and its corresponding setting part are improved and a replacement procedure for replacing an expendable part is facilitated. The front structure is adapted to give an impact response curve with deceleration versus time, when subjected to a full frontal barrier impact at 35 mph according to USNCAP. The output control information generating unit generates output control information regarding the partial regions set by the partial region setting unit. The arrangement of display fields on the monitor unit corresponds at least schematically to the arrangement of the press switches, whereby the display fields are allocated to the press switches.