In the electronic device (10), the processor (16) determines whether or not the object has approached the own device in the proximity determination period based on the irradiated reflected light of the first infrared, and the first infrared and A captured image is generated based on the reflected second infrared light that is partially overlapped and irradiated, and biometric authentication is performed during the authentication period using the generated captured image. In the proximity determination period, the processor (16) irradiates the first infrared ray, and stops the irradiation of the second infrared ray.電子機器（１０）において、プロセッサ（１６）は、照射された第１の赤外線の反射光に基づいて、近接判定期間において物体が自機に近接したか否かを判定し、第１の赤外線と波長が一部重なり且つ照射された第２の赤外線の反射光に基づいて、撮像画像を生成し、生成された撮像画像を用いて、認証期間において生体認証を行う。また、プロセッサ（１６）は、近接判定期間では、第１の赤外線を照射させる一方、第２の赤外線の照射を停止させる。
