An associated heel binding-ski brake assembly which comprises a binding body which is longitudinally slidable on a track to be affixed to a ski. The binding body is forwardly biased by a retraction spring; the assembly further comprises a ski brake comprising at least one projection pivotable around a horizontal substantially transverse axis. An elastic member biases the projection to the active position to activate the brake, and a control element de-activates the brake. The elastic member moves together with the binding.