IMAGE FORMING DEVICE

PROBLEM TO BE SOLVED: To provide an image forming device that conducts aggregation print on one transfer paper according to a number of read times of original images so as to enhance the operability of the aggregation print. SOLUTION: Image data of a first original A are stored to a memory block 10 with unmagnification corresponding to the size of transfer paper (S41). Before reading image data of a next original B, a system control section 5 reduces the image data as data A stored in the memory block 10, stores the reduced data to a memory block 20 this time, and reduces image data of a new original B at the same reduction rate as above and stores the reduced image data as data B side by side with respect to the data A to the memory block 20 (S42). The image data A, B in the memory block 20 are furthermore reduced to be able to store image data of a new original C, and the reduced image data are stored in an image storage area of the memory block 10 (S43). The processing above is repeated until a new original D is read (S44-45). When automatically reading image data of a plurality of the originals, the image data are sequentially reduced to the memory blocks 10, 20 and stored in this way.