To provide a bearing device having reduced friction force along the rotation of a rotor, and also to provide an image forming device having the same.

The image forming device 10 has a photoreceptor 20, and the bearing device 100 for supporting a shaft 46 of the photoreceptor 20. The bearing device 100 has: a rotary sleeve 102 fixed to the rotating shaft 46 at least in the rotating direction of the shaft 46; a fixed sleeve 150 fixed to an image forming structure body 36 supporting the shaft 46 at least in the rotating direction of the shaft 46; and a cover member 180 for thrusting the rotary sleeve 102 and the fixed sleeve 150 to abut on each other in the direction of the shaft 46. The rotary sleeve 102 and the fixed sleeve 150 have contact portions for contacting each other, at least one of which is formed as a part of the conical surface with an axis 48 of the shaft 46 as a center line.