A leg stretching device is provided, which can provide a stable, efficient leg stretching effect for leg stretching methods and legs of users because the leg stretching device has flexible responses to the method and legs of users. The leg stretching device includes a fixed housing having a fastening hole and a coupling groove, a movable housing penetratingly coupled to the fastening hole of the fixed housing to be movable and having a support means provided on one side thereof to enable a user seated thereon, a pair of auxiliary housings detachably coupled to the coupling groove of the fixed housing in an opposite direction thereto, and a connection portion having one side connected to the fixed housing and the other side connected to the movable housing to control movement of the movable housing in a length direction thereof.
