Biological information measuring apparatus and control method thereof

Biological information measuring device driven by a battery includes a measuring unit for measuring biological information includes an oscillation circuit, and a clock unit for generating time information by counting clock pulses generated by the oscillator circuit. The biological information measurement device while maintaining the power supply to the clock unit from the battery, the biological information measuring device has a power supply unit to a power-off state, in response to detection of a predetermined condition, the clock unit oscillator oscillation is stopped, and shifts the oscillation circuit at the next power-on to the oscillation state.