A device is known for measuring the respiration rate of a subject based on his/her electrocardiographic complex or pulse wave. However, when or if the subject is doing exercising or acting normally, an electromyographic complex is superposed on the electrocardiographic complex, and the body movement component is superposed on the pulse wave, this leading to an error in measurement. An improvement is needed to cope with this problem. A personal computer is provided which comprises a watch-type portable portion adapted to be worn by the subject and a device main body (330). Connected to the portable portion is a photo-electric type pulse sensor adapted to be mounted at the base portion of a finger to measure the pulse wave pattern. In addition, an acceleration sensor is also provided on the portable portion to detect the body movement spectrum of the subject. The device main body (330) applies a window function to the pulse wave and removes the body movement spectrum from the frequency spectrum of the pulse wave by removing the acceleration component. It is possible to generate the respiration rate and variation rate thereof. IMAGE
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