An image processing apparatus includes: an input section which inputs image data; a memory section which memorizes non-volatily various data including image data inputted by the input section; a cache memory; a control section which carries out an asynchronous operation which writes data to the cache memory in stead of writing to the memory section as well as carries out a sync processing which transfers and stores the data of the cache memory to the memory section based on a predetermined condition; and a detecting section which detects a preparation for carrying out a shut down operation of a power of the image processing apparatus, wherein the control section carries out the sync processing in case when the preparation operation is detected by the detecting section.