An image processing apparatus includes: a first image processing section to which original image data is inputted; an image storing section connected downstream of the first image processing section; a second image processing section connected downstream of the image storing section; a loop-back path through which image data output from the second image processing section is returned to the first image processing section; an instruction inputting section which inputs an instruction in relation to a processing content; a controller for controlling a flow of image data and contents to be processed in the first and second image processing sections according to the instruction input from the instruction inputting section, wherein a plurality of types of image data different from each other in contents which have been processed, are capable of being generated on the basis of the original image data.