<；P>；PROBLEM TO BE SOLVED: To make it possible to monitor the state of a player during a game so as to evade technostress. <；P>；SOLUTION: The heartbeat fluctuation detection system 100 for a game comprises a measurement part 110 configured to be attachable and detachable to/from a controller of a game machine for detecting biological information relating to the heartbeat of a player holding the controller and a body part 102 of the game machine which can be connected with the measurement part 110 by radio communication. The measurement part is provided with an analysis means for performing time domain analysis for the heartbeat interval of the player extracted from the detected biological information relating to the heartbeat, and a transmission means for wirelessly transmitting an analyzed result by the analysis means to the body part. The body part 102 is provided with a calculation means for calculating heartbeat fluctuation on the basis of the received analyzed result, and an output means for performing output corresponding to the heartbeat fluctuation calculated by the calculation means. <；P>；COPYRIGHT: (C)2008,JPO&INPIT
