To easily remove a separating means 20 which is simply constructed at low cost and separates a photosensitive drum 14b and a process means 14c, even after mounting on an image forming device body.

The separating means 20 interposed between the photosensitive drum 14b and the process means, such as an electrification means 14c, is formed of a flexible member which is removed by pulling operations after equipping a drum unit 14a to an image forming device body 10. Thereby, the separating means 20 is moved along the surface of the drum unit 14a by the flexibility of the separating means 20. Even after the drum unit 14a is equipped to the image forming device body 10, the separating means 20 is removed by pulling it out of outside.