Provided is a retracting device in which dampers have improved durability and strokes of operation of the dampers are not reduced. A first slider 14-1 for assisting closing, a second slider 14-2 for assisting opening, and a damper base 22 are provided in an elongating base 12 to be slidable in a longitudinal direction of the base 12. The damper base 22 is disposed between the first slider 14-1 and the second slider 14-2. A first damper 24 is provided over between the first slider 14-1 and the damper base 22 and a second damper 25 is provided over between the second slider 14-2 and the damper base 22.