To prevent the spring-back of a drawer at the time of insertion and imprudent projection at the time of an earthquake or the like by simple constitution, to eliminate the generation of a fault or the like by using a leaf spring for a control body, to miniaturize a structure and to easily perform attachment to the drawer sliding mechanism of a cabinet or the like without spatial margin.

The control body 7 made of the leaf spring is arranged inside an outer rail 1 to which an inner rail 13 is slidably mounted and the first engaging part 8 of the control body 7 is turnably engaged with a fixed shaft 5 projected to the inner surface of the outer rail 1. Also, an engaging shaft 14 to be engaged with the second engaging part 10 of the control body 7 is projected to the inner rail 13. Accompanying the sliding of the inner rail 13, in a state where the engaging shaft 14 is moved in the pull-in direction of the drawer more than the fixed shaft 5, the inner rail 13 is energized in the pull-in direction of the drawer by the restoration force of the control body 7.