The present invention provides a walking assist device including a seat member (1) where a user (P) sits astride; and a support member (2L, 2R) which is provided at a bottom side of the seat member (1); wherein the walking assist device includes a connection portion (106) which connects the seat member (1) to the support member (2L, 2R) in such a way that the seat member (1) is able to swing laterally around a spindle (106a) located at a middle portion of the anteroposterior width of the seat member (1) which the user (P) contacts. Therefore, the resistance force from the seat portion that the user (P) is subject to when the user (P) swings the hip to walk is reduced, thereby improving the usability of the walking assist device.