PROBLEM TO BE SOLVED: To provide an automatic draw-in device to be used in a slide rail and also used even in a small space without affecting the stroke of a drawer or the like.SOLUTION: An automatic draw-in device includes a draw-in guide member attached to a fixed body and an engagement member attached to a movable body. The draw-in guide member includes: a draw-in guide groove; a guide locking groove; a locking body having a locking projection fitted and inserted into the draw-in guide groove and guide locking groove; and a torsion coil spring. The engagement member includes: an engagement portion for moving a locking projection from a draw-in side end of the draw-in guide groove to the guide locking groove; and an escape guide surface for moving the locking projection positioned at the guide locking groove toward a draw-in guide groove side so as to be locked to the engagement portion, and drawing in the movable body together with the engagement member by the repulsion force of the torsion coil spring.