A vehicle seat includes a back portion, a seat portion, and two driving assemblies. The back portion includes a resisting portion and a movable portion. The seat portion is coupled to the back portion and includes a bottom wall and a movable wall. One driving assembly is positioned in the back portion and the other driving assembly is positioned in the seat portion. The driving assembly positioned in the back portion is coupled to the movable portion and is configured to drive the movable portion to move relative to the resisting portion. The driving assembly positioned in the seat portion is coupled to the movable wall and is configured to drive the movable wall to move relative to the bottom wall.