<p>An image forming apparatus is provided to remove the user inconvenience of performing two steps of adjusting the width of paper again after adjusting the length of the paper. A length adjusting member(110) includes a length adjustment rack gear part adjusted according to the length of paper. A width adjusting member(120) includes a width adjustment rack gear part adjusted according to the width of the paper. A pinion member(130) includes the first pinion part geared with the length adjustment rack gear part to allow the width adjusting member to interwork when the length of the paper is adjusted by the length adjusting member, and the second pinion part geared with the width adjustment rack gear part and rotated when the first pinion part is rotated. The first and second pinion parts have each different diameter so as to adjust the width and length of the paper according to paper loaded in the paper supply cassette.</p>
