The image forming apparatus includes an image processing portion for creating image data of a document read by an image reading portion and a communication portion for transmitting the created image data to a server or cloud, and obtains the image data saved in the server or the like to perform required processing, in which a reduced image generating portion for creating reduced image data based on the created image data, a main storage portion for linking the reduced image data and a saving destination of the data serving as original thereof for storage, and a display portion for displaying an operation screen are included, and the reduced image data stored in the main storage portion is displayed on the display portion to select image data for which the required processing is performed.