To relieve impact when landing from a jump in a sliding device provided with a sliding board sliding on a snow slope.

In this handle support device 10, a first connection part 11 mounted to a handle 4, and a second connection part 12 mounted to a stem shaft 5, are connected to each other by a pair of arms 13, 14 mounted to move as two upper and lower sides of a parallelogram, and the first connection part 11 is supported by a coil spring 21 pressing it from the second connection part 12, and a damper 16 that becomes a resistance only when the distance between the handle 4 and stem shaft 5 is shortened. Impact can be absorbed by the coil spring 21 and damper 16, and the handle 4 is supported by the arms 13, 14 so that its angle to the stem shaft 5 does not change. Further, when pressure from a snow surface is weakened, a front board can always be pressed by the coil spring 21, so that snow surface follow-up performance and operating performance are excellent.