A developer leakage preventing member that is fitted to an image forming apparatus shipped with a developing member being attached to an apparatus main body so as to oppose an intermediate transfer body, and which prevents leakage of a developer from the developing member,
- the developer leakage preventing member comprising:
- a first surface having a shape with which an opening portion of the developing member is closed;
- and
- a second surface having a shape that approximately resembles a part of a shape of the intermediate transfer body.