A mechanical interlock for securing either ice skates or roller skates to a single base member. The base member has surfaces for receiving the foot of the user and the interlock includes a pair of upstanding studs disposed at one end of the skate which cooperate with recesses in the base plate. An elongated leaf spring is secured to each skate at one axial extremity for pivotal motion in a plane parallel to the plane of the base plate. Disposed on the other axial extremity of the spring is a pair of fingers disposed for snug fitting engagement with the top and bottom respectively of the base plate and the skate.