PURPOSE: To dispense with carrying a key about a person, and also, to manage a maintenance person by attaching the personal identification device to a game machine so that a maintenance door is opened by only putting a finger on a personal detecting part, and maintenance information is recorded in a host computer.

CONSTITUTION: In a game machine 1, a personal feature image detecting part 2 is arranged. A fingerprint of a person used by a registration personal feature image detecting part 3 is registered in advance in a personal identification machine 4. When a person who uses this machine puts his finger on the personal feature detecting part 2, a personal feature data signal is sent to the personal identification device 4 and collated with personal feature data registered in advance. When it is confirmed to be the person himself, a signal is transmitted to an electronic lock controller and an electronic lock 1 is opened. Also, a name of a maintenance person, a number of a Japanese pinball game (PACHINKO) machine stand, etc., the date and hour, a work time, etc., are recorded in a host computer.