A separation member separates a sheet, conveyed by a separation roller in a conveying direction, from remaining sheets supported by a support member. At least one of a first guide and a second guide is a movable guide which moves in a width direction orthogonal to the conveying direction to increase and decrease a distance therebetween. An urging member is retained, at one end thereof, by a base portion in an elastically deformed state and urges the separation member toward the separation roller. In response to the movable guide decreasing the distance between the first guide and the second guide, an engaging mechanism reduces elastic deformation of the urging member by moving the base portion in a first direction. In response to the movable guide increasing the distance, the engaging mechanism moves the base portion in a second direction opposite to the first direction.