Abstract: This invention relates to golf training devices, and in particular discloses a device for stabilizing a golfer's feet and stance while he practices his swing. In a preferred embodiment, the device comprises a substantially flat mat in which a left foot gripping element and a right foot gripping element are each slidably engaged. The gripping element have a front tongue and a rear tongue respectively engaged with a front groove in a raised front border and with a corresponding rear groove in a raised rear border of the flat mat. The gripping element can thus secure a golfer's feet parallel to each other in a given stance while the golfer practices a golf swing. The gripping element can be slid nearer or farther away from each other and locked in the selected position to provide a variety of widths of stance. The device is thus useful as a training device in order to prevent the golfer from getting his feet in the wrong orientation to each other during the course of his swing.