An image forming apparatus comprising: a body including a mount face; an opening, disposed inside the body, into which a recording medium is ejected; a scanner disposed above the opening; an operation display movably mounted on the mount face of the body, the operation display configured to move in the movement range in which the operation display does not enter the opening, does not protrude outward beyond the mount face of the body, and does not protrude upward beyond the scanner; a four bar linkage defining a movement range of the operation display and including: a first arm coupling a part of the mount face with a part of the operation display; a second arm coupling another part of the mount face with another part of the operation display; a first rotation shaft mounted on the first arm and coupled with the body; a second rotation shaft mounted on the second arm and coupled with the body; a third rotation shaft mounted on the first arm and coupled with the operation display; and a fourth rotation shaft mounted on the second arm and coupled with the operation display; characterized by: further comprising a frictional resistance applicator, mounted on at least one of the first rotation shaft, the second rotation shaft, the third rotation shaft, and the fourth rotation shaft, to apply a frictional resistance to the at least one of the first rotation shaft, the second rotation shaft, the third rotation shaft, and the fourth rotation shaft; wherein the frictional resistance applicator applies the frictional resistance to the at least one of the first rotation shaft, the second rotation shaft, the third rotation shaft, and the fourth rotation shaft when the operation display moves, such that the frictional resistance changes according to a total change of interior angles formed by the first to fourth rotation shafts (201a, 202a, 201b, and 202b). a body including a mount face; an opening, disposed inside the body, into which a recording medium is ejected; a scanner disposed above the opening; an operation display movably mounted on the mount face of the body, the operation display configured to move in the movement range in which the operation display does not enter the opening, does not protrude outward beyond the mount face of the body, and does not protrude upward beyond the scanner; a four bar linkage defining a movement range of the operation display and including: a first arm coupling a part of the mount face with a part of the operation display; a second arm coupling another part of the mount face with another part of the operation display; a first rotation shaft mounted on the first arm and coupled with the body; a second rotation shaft mounted on the second arm and coupled with the body; a third rotation shaft mounted on the first arm and coupled with the operation display; and a fourth rotation shaft mounted on the second arm and coupled with the operation display; a first arm coupling a part of the mount face with a part of the operation display; a second arm coupling another part of the mount face with another part of the operation display; a first rotation shaft mounted on the first arm and coupled with the body; a second rotation shaft mounted on the second arm and coupled with the body; a third rotation shaft mounted on the first arm and coupled with the operation display; and a fourth rotation shaft mounted on the second arm and coupled with the operation display; characterized by: further comprising a frictional resistance applicator, mounted on at least one of the first rotation shaft, the second rotation shaft, the third rotation shaft, and the fourth rotation shaft, to apply a frictional resistance to the at least one of the first rotation shaft, the second rotation shaft, the third rotation shaft, and the fourth rotation shaft; wherein the frictional resistance applicator applies the frictional resistance to the at least one of the first rotation shaft, the second rotation shaft, the third rotation shaft, and the fourth rotation shaft when the operation display moves, such that the frictional resistance changes according to a total change of interior angles formed by the first to fourth rotation shafts (201a, 202a, 201b, and 202b). further comprising a frictional resistance applicator, mounted on at least one of the first rotation shaft, the second rotation shaft, the third rotation shaft, and the fourth rotation shaft, to apply a frictional resistance to the at least one of the first rotation shaft, the second rotation shaft, the third rotation shaft, and the fourth rotation shaft; wherein the frictional resistance applicator applies the frictional resistance to the at least one of the first rotation shaft, the second rotation shaft, the third rotation shaft, and the fourth rotation shaft when the operation display moves, such that the frictional resistance changes according to a total change of interior angles formed by the first to fourth rotation shafts (201a, 202a, 201b, and 202b).