An image processing device has an image processing section. The image processing section has one or more image processing modules and one or more buffer modules. Each image processing module has an image processing engine and a control section. The image processing engine carries out an image processing on image data in units of a unit processing data amount. The control section inputs the image data to the image processing engine. The one or more image processing modules is selected from a plurality of the image processing modules for carrying out the image processing by the image processing engine, and the buffer module is connected to at least one of an image processing module which is selected.