An invented image processing apparatus includes an image data storing unit for storing image data in a prescribed file format, an image data information producing unit for producing, in response to a request from a user, image data information corresponding to the image data stored in the image data storing unit, a requested format entering unit for entering a requested format of the image data designated by the user from the image data information, and a transmitting unit for transmitting the image data corresponding to the requested format. A user can obtain the image data stored in the prescribed file format with user's desired file format.