Developing device with filter and a plurality of air exit paths and image forming apparatus

A developing device comprising:

• a housing in which a developer is contained;
• a cover configured to cover an upper opening of the housing;
• a developer holder that is supported by the housing and holds the developer on an outer surface and rotates;
• a regulating member that faces the developer holder and configured to regulate an amount of the developer on the outer surface;
• a first exit path inclined toward an inside of the housing and configured to exit air from the inside of the housing to an outside of the cover;
• and
• a second exit path that connects the first exit path and a filter provided on the cover, the filter preventing passage of the developer and allowing passage of the air, wherein
• the regulating member includes a regulator that faces the developer holder with a predetermined gap between the regulator and the developer holder, an attachment that intersects with the regulator and extends from the regulator, and a guide that is directly in contact with and intersects the attachment and inclines toward the inside of the housing,
• the first exit path is a gap between an upper surface of the guide and an inner surface of the cover facing each other, and
• the second exit path is a gap between an outer surface of the cover and an inner surface of the filter facing each other and inclining along the first exit path.