Patent ID: 8139976

Claim:
A developing apparatus, comprising: a housing comprising: an opening that opens towards an image carrier on which an electrostatic latent image is formed; and a developer storing unit in which a developer is stored; a developer carrier configured to: carry the developer stored in the developer storing unit; and transport the developer to a developing region in opposition to the image carrier; a partitioning frame arranged in a groove formed between the developer carrier and the developer storing unit of the housing, that is provided with a connecting hole which enables connect between the developer storing unit and the opening; a partition arranged on a side surface of the partitioning frame; and a closely contact section that causes the partitioning frame to closely contact to the groove, wherein the closely contact section is arranged between the groove and a side surface of the partitioning frame not provided with the partition, wherein the closely contact section includes an elastic member sandwiched between the partitioning frame and the groove, and wherein a plurality of the closely contact sections are provided at intervals.