The golf swing practice device has a floor pad; a hollow tee extending upward from a surface of the floor pad, a ball resting on an end of the tee; and an elastic cord attached to the ball and to the floor pad and extending through the tee. The golf swing practice device also has a socket on a lower end of the tee and a bulge on a surface of the pad. The bulge has a forward-facing slot enclosing the strike side of the elastic cord. The socket on the tee encloses the bulge. The socket and the bulge have complementary spherical shapes that are easily but fitly mounted over and into one another. In other aspects of the invention, the floor pad has a ramp on a strike side of the bulge, and a semicircular groove in its surface, on a forward side of the bulge.