An image forming apparatus includes a cover and a hinge portion. The hinge portion couples the cover with an apparatus main body in openable/closable manner. The hinge portion includes an inner rail member, an intermediate rail member, and a movable rail member. The inner rail member is provided on an inner side of an opening in the apparatus main body, and is arc-shaped. The intermediate rail member is slidably supported by the inner rail member and displaced between a first position and a second position. The movable rail member includes a coupling portion and a supported portion, is slidably supported by the intermediate rail member, and when the cover is opened, is slid from a third position to a fourth position which is further outward of the opening than the third position and at which the coupling portion is disposed below a lower edge of the opening.