To accurately find calorie consumed during exercise time and a non- exercise time.

A calorimeter 1 is made of an acceleration sensor 2, a pulse sensor 3 and a signal processing card 4, and the CPU of the signal processing card 4 makes judgment about an exercising state on the basis of an acceleration signal from the acceleration sensor 2. Also, the CPU monitors a change in the number of pulses detected with the pulse sensor 3, converts measured pluses to the number of pulses per constant time and compares the converted number of pulses with the number of pulses at a normal time (non-exercising time) previously stored in a memory. In this case, when the acceleration signal outputted from the acceleration sensor 2 does not show an exercising state, the CPU calculates a calorie on an average time basis, using a proportional relation the number of pulses to the consumed calorie. Also, when the acceleration signal from the acceleration sensor 2 shows an exercising state, the CPU judges the exercising state, and calculates a calorie consumed per average time in each exercising state based on the exercising state and speed, and even personal information.