A biological information detection device includes: a light-emitting unit that emits light to a subject； a light-receiving unit that receives reflected light or transmitted light from the subject； and a current control unit that supplies the light-emitting unit with a current signal for causing the light-emitting unit to emit the light. For a first period of a light emission period of the light-emitting unit, the current control unit supplies the light-emitting unit with the current signal with a current value greater than for a second period of the light-emission period.
