An image forming apparatus has: a first conveyance device having a plurality of first suction holes; a treatment liquid deposition device; a second conveyance device which is provided downstream of the first conveyance device in terms of a conveyance direction in which the recording medium is conveyed; and an image forming device, wherein the first suction holes of the first conveyance device and the second suction holes of the second conveyance device are formed in such a manner that first suction positions on the recording medium which are suctioned by the first suction holes of the first conveyance device and second suction positions on the recording medium which are suctioned by the second suction holes of the second conveyance device are mutually different.