PROBLEM TO BE SOLVED: To generate bioinformation to be used for game machines in a handy and non-invasive fashion.SOLUTION: The optical biometric device 2 is mounted on the head part of a player 3 on a game machine 1 and generates biosignals pertaining to the body of the player 3 which are used to carry out at least one of the decision on the contents of the progress in game and the display of the physical or psychological condition of the player 3 in the game machine 1. The optical biometric device 2 has a light irradiator 203 for irradiating the head part of the player 3 with light, a photodetector 204 for detecting the reflected light on the head part of the light irradiated and a signal processing means 210 which generates information on the condition of at least one of his or her brain and heart from one or both of the blood streams in the brain and the head skin of the player 3 based on the reflected light detected and transmits the information generated to the game machine 1 as a biosignal.
