A roller device includes a first roller; a second roller that rotates around a rotation axis extending in a first direction and that is disposed upstream of the first roller in a second direction; a bearing that supports the second roller and includes a projection; an urging unit that urges the bearing in the second direction; and a passage member having a gap that defines first and second passages that respectively extend in the first and second directions and supporting the bearing. The projection is inserted in the gap. The bearing is movable in the first and second directions. The first and second rollers are apart from each other when the projection is in the first passage. The bearing is moved in the second direction so that the first and second rollers are pressed against each other when the projection is in the second passage.