An image processing device includes a plurality of clock selection units configured to select a clock signal to be supplied to each of a plurality of calculation units forming a pipeline from a plurality of clock signals and output the clock signal to the calculation unit, a data delivery unit disposed on the pipeline between the calculation unit to which a first clock signal is input and the calculation unit to which a second clock signal is input, and a control unit configured to control a selection of the clock signal and a combination and a disposition order of the data delivery unit and the calculation units forming the pipeline in accordance with an operation mode of image processing.