IMAGE FORMING APPARATUS, AUTOMATIC COPY METHOD AND NON-TRANSITORY COMPUTER READABLE RECORDING MEDIUM ENCODED WITH AUTOMATIC COPY PROGRAM

An image forming apparatus includes a document tray in which a document is to be set, a medium container that contains a recording medium, a document detection sensor that detects a document set in the document tray, a medium detection sensor that detects a recording medium contained in the medium container. A hardware processor executes a copy operation of forming an image obtained by scanning a document set in the document tray on a recording medium, determines to automatically execute the copy operation in case an elapsed period of time between a document detection time when a document is detected by the document detection sensor and a medium detection time when a recording medium is detected by the medium detection sensor is equal to or smaller than a predetermined operation period of time, and automatically executes the copy operation based on determination of automatic execution of the copy operation.