An image forming apparatus includes a first body, an image forming portion, a first conveying passage provided inside of the first body and to convey toner discharged from the image forming portion, a second body detachably connected to the first body, and a second conveying passage to convey the toner received from the first conveying passage. The second conveying passage receives the toner from the first conveying passage in the first body. The second conveying passage is projected from the first body into the second body when the second body is connected to the first body, and is detachable from the first body while leaving the first conveying passage in the first body.