Patent ID: 8818231

Claim:
An image forming apparatus, comprising: a developing device that includes: a developing container that contains toner; and a developing roller that is disposed so as to be opposed to an image carrying member, with part of an outer peripheral surface thereof exposed from an opening portion of said developing container, and supplies toner to the image carrying member; a duct that communicates with a suction port that is provided in a vicinity of the opening portion of the developing container; a first fan that generates an airflow in said duct and discharges air that has passed through the suction port and through the duct to an outside of a main body of the apparatus; a dust collection part that captures toner that has passed through the duct together with an airflow generated by said first fan; and a connection portion that is provided at some point along a length of the duct, can store part of toner that passes therethrough together with an airflow, and has a main body and a lid portion that is openable and closable with respect to said main body.