An image forming apparatus includes a duct, a filter provided inside the duct, a first fan provided on an upstream side of the filter in an exhaust direction and a second fan provided on a downstream side of the filter in the exhaust direction. A first mode operation containing a first operation in which the first fan sends air to the filter and a second operation in which the second fan sends air to the filter after the first operation is performed at least once, and then a second mode in which the first fan sends air in the exhaust direction is performed.