To realize a running device having a function capable of performing appropriate braking in stepping down a lower step in the simplest constitution.

The running device has a wheel 2 for movably supporting a body 1, and a lifting mechanism on a step having a support member 3 rotatably mounted to a position that does not disturb rotation of the wheel 2 and an arm 4 that is mounted to a part displaced from the rotation center of the support member 3, is driven using the support member 3 as a platform, and allows the tip to move in the separating direction from the rotation center. The running device has a ground member 81 supported relatively movably with respect to the body 1, and a braking member 82 for braking the rotation of the wheel 2. Thus, relative upward displacement with respect to the body 1 of the ground member 81 that is ground to a floor surface and receives reaction from the floor surface is interlocked with the braking of the rotation of the wheel 2 by the braking member 82.