Abstract: A ski binding heel assembly for releasably securing the heel of a ski boot on a ski incorporates structure providing or "radial release" of the ski boot, i.e. release in response to displacement forces applied in a plane transverse to the length of the ski, irrespective of whether this displacement force is applied laterally or vertically, or in some intermediate direction. The ski binding includes a spring loaded latching element with a broad tapered tongue which is pressed into engagement with a socket in the heel of the ski boot. When a displacement force is applied to the heel of the ski boot, the complementary surfaces of the tongue and socket co-operate to cam the tongue back into the binding, thus releasing the ski boot.