| 摘要 |
A developing device, a process cartridge and an image forming apparatus which are capable of suppressing inconveniences such as stagnation of a developer at a taking-in portion of the developer and deterioration of the developer due to sliding of the developer with a developer carrying member in the case where a magnetic sealing member is used are provided. A developing device 104 includes, with respect to an axial direction of a developer carrying member 2, a first region 2a including a developing region X and a second region 2b outside the first region 2a, adjacent to the first region 2a, and having lower developer feeding power than in the first region 2a or having substantially no feeding power, at an outer peripheral surface of the developer carrying member 2, and has a constitution in which a boundary 2d between the first region 2a and the second region 2b of the outer peripheral surface of the developer carrying member 2 at end portions of the developer carrying member 2 with respect to the axial direction of the developer carrying member 2 is positioned between a magnetic sealing member 4 and a magnetic member 5 with respect to the axial direction of the developer carrying member 2. |
