An imaging device includes a non-contact communication unit and a control unit. The non-contact communication unit performs non-contact communication with an external device. The control unit controls turning ON/OFF power and an imaging preparation operation of the imaging device. The control unit performs control of turning ON power of the imaging device when detecting a polling command which is transmitted from the external device by the non-contact communication, of transmitting connection information regarding wireless communication connection with the external device to the external device after the power is turned ON, and of performing the imaging preparation operation when transmission of the connection information is completed.