PROBLEM TO BE SOLVED: To provide a walking support device, when a leg in a side on which the walking support device is mounted becomes an idling leg state, even when a toe part of the leg comes into contact with the ground, capable of optimally stepping out in an advancing direction of the user.SOLUTION: A walking support device 1 according to one embodiment of the present invention is mounted on a leg of a user for supporting the bending/stretching movement of the knee joint of the user. The walking support device includes a rotation roller 5 disposed at a toe part of the user, with the walking support device mounted on the users leg, where the rotation roller 5 is rotatable in the advancing direction of the user.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT