An image forming apparatus includes first and second units including first and second feeding members respectively for feeding a medium, and a medium feeding path provided between the first and second units. The second unit is movable between a closing position where the medium feeding path is formed between the first unit and the second unit and an opening position where the second unit separates from the first unit to open the medium feeding path. The second feeding member has a second gear that meshes with a first gear of the first feeding member when the second unit is in the closing position. When the second unit moves to the closing position, a shift mechanism holds one of the first gear and the second gear at a retracted position where the first gear and the second gear do not mesh with each other.