An imaging device includes an imaging unit, a buffer unit, an image processing unit, a processing determining unit and a power control unit. The imaging unit has an imaging sensor converting a subject image into an electrical signal and generates an image data of a photographed image. The buffer unit has a terminating resistor and temporarily stores the image data. The image processing unit performs image processing on the image data. The processing determining unit determines whether or not high-speed processing requiring a high-speed data transfer is performed. The power control unit disables the terminating resistor of the buffer unit and sets a clock supplied to the buffer unit at low speed compared to a case in which the terminating resistor is enabled when the high-speed processing is not performed. As a result, it is possible to reduce power consumption in the imaging device supporting the high-speed processing.