A conveyor includes: a supporting member which supports the first and second roller units to allow the first and second rollers to take one of a first conveyance position and a first retracted position; a movable member which is movable between a first position where the first roller and the second roller take the first conveyance position and a second position where the rollers take the first retracted position; a cover member which is switchable between a closed state where the cover member is a part of the conveyance passage and an open state where a part of the conveyance passage is open; and an interlocking mechanism which is configured to move the movable member to the second position when the cover member is in the open state and moves the movable member to the first position when the cover member is in the closed state.