Patent ID: 7170630

Claim:
A communication terminal device with both-side receiving function comprising: a receiving means for receiving an image wherein said receiving means is capable both of first receiving images of front pages and then receiving images of back pages and receiving images of front pages and back pages alternately; a recording unit capable of carrying out both-side recording; an image memory for storing an image; and a control unit for performing control by a first control mode in which a received image is stored in the image memory, and, regardless of the receiving order, when images of two pages that are in relationship of a front page and a back page are stored in the image memory, the images of the two pages are recorded on both sides of a sheet by the recording unit and are erased from the image memory, and a second control mode in which both-side recording is started after receiving of images of all pages has been completed, wherein the control unit performs control such that when free space in the image memory is more than a predetermined amount, the control unit selects the second control mode, and when the free space in the image memory is not more than the predetermined amount, the control unit selects the first control mode.