To provide a parking lot management machine for handling both a picture for guidance and a picture for setting installed in a parking fee adjusting machine as a parking lot management machine by one display unit, and for achieving the maintenance of an internal device type without being hindered by the structure of the display unit.

A setting display device 30 mounted through a setting display device mounting unit TU on the inside of a parking fee adjusting machine 1 is configured to move among a first position where a guidance picture 31A of a display unit 31 is made visible from the front section side through a guidance window section 10A of a front door 10 and a second position where the display unit 31 is made visible from the inside (back side) of the front door 10 which is opened, and a setting key 32 is made operable and a third position where the display unit 31 is made visible from the side face of a side door 20 which is opened, and the setting key 32 is made operable.