IMAGE FORMING DEVICE

PROBLEM TO BE SOLVED: To provide an image forming device that sets a blank interval of an image and can form images from a plurality of originals onto one paper sheet by synthesizing them. SOLUTION: The image forming device is provided with an original automatic carrying means that feeds an original from a 1st original placing section to an exposure section and carries an exposed original to a 2nd original placing section, develops a toner image corresponding to the image of the original onto a photoreceptor through the exposure, and a transfer section transfers the toner image onto the paper from the feed section to form the image on the paper. The image forming device is also provided with a paper size detection means 94 that detects a paper size, an original size detection means 93 that detects an original size, a counter 95 that counts number of originals, and a blank interval setting means that sets a blank interval among the images when the image is formed without overlapping a plurality of the original images onto one paper sheet. The reduction rate is decided on the basis of the total size of the placed originals calculated from number of the originals and the original size, the blank interval among the images, and the paper size and the images on a plurality of the originals are formed on one paper sheet without overlapping.