An apparatus to feed paper in an image forming device, which picks up papers with various thickness received in the feeding stand without a feeding error, and transfers the same to the developing unit. The apparatus includes, a feeding stand to receive a plurality of papers, and having a separating guide inclined at a predetermined angle with which the front end of the paper makes contact with; a main pickup roller that makes contact with the paper on the uppermost layer in the upper part of the feeding stand to pick up the paper towards the separating guide using frictional force generated via rotational contact with the paper; and an auxiliary pickup roller positioned between the main pickup roller and the separating guide to apply a predetermined pressure to the paper upon picking up of the paper by the main pickup roller.