An image processing apparatus, comprising: an input portion that inputs image data of a plurality of pages of document; a password detector that detects a password given to each of the pages; a password judger that judges from a detecting result drew by the password detector about each of the pages, whether or not a shared password issued for each page in common is detected in addition to an individual password uniquely issued for each page; an entry requester that requests entry of a shared password if it is judged by the password detector that a shared password is detected, and requests entry of an individual password about each of the pages if it is judged by the password detector that a shared password is not detected; and an output permitting portion that permits image data of all the pages each having a shared password, which is the image data inputted by the input portion, if the appropriate shared password is entered in response to the request for entry of a shared password, and permits image data of a page having an individual password, if the appropriate individual password is entered about that page in response to the request for entry of an individual password.