A power supply control device includes a monitoring controller, a moving body detector, and a power supply controller. The monitoring controller controls a processor, an interface part, and an identification information acquisition part. The moving body detector detects whether or not a moving body including a user who intends to use the processor exists within a specific region. The power supply controller individually allows objects to be controlled including the processor, the interface part, the identification information acquisition part, and the monitoring controller to enter a power supply state or a power interruption state in an independent manner, in accordance with detection information by the moving body detector, and first controls the identification information acquisition part to be shifted from the power interruption state to the power supply state in a case where all the objects to be controlled are in the power interruption state.