There is provided a detecting unit 13 for detecting an apnea condition of a user based on correlation of acceleration information to be measured by an acceleration sensor 11 for detecting a motion of a body as an acceleration and angular velocity information to be measured by an angular velocity sensor 12 for detecting the motion of the body as an angular velocity. By deciding that the apnea condition is brought only when both an acceleration to be measured by the acceleration sensor 11 and an angular velocity to be measured by the angular velocity sensor 12 indicate the apnea condition, it is possible to detect apnea during sleeping more accurately.
