An image forming apparatus includes an image forming portion, a first collecting container, a second collecting container, and a feeding device. The feeding device includes a lateral feeding passage capable of feeding the toner, discharged from the image forming portion, in a direction crossing a vertical direction. The lateral feeding passage includes a first discharging opening, a second discharging opening, and a receiving opening provided between the first and second discharging openings, for receiving toner discharged from the image forming portion. The feeding device includes a helical feeding member rotatable about a rotation axis along the lateral feeding passage, and a driving portion for rotationally drive the helical feeding member in a normal direction and a reverse direction.