Abstract: A side connection terminal block of the kind comprises a generally tubular stirrup member fixed relative to an insulating material body common to two connecting terminals and laterally accessible at each end from the outside of the body through a lateral opening therein, for insertion of an electrical conductor. A clamping screw is immobilized axially relative to the stirrup member but relatively rotatable. A cable clamp presses the electrical conductor against a connecting link common to the two connecting terminals. The cable clamp which is disposed inside the stirrup member is prevented from rotating relative thereto and is interlocked with said clamping screw. The clamping screw is entirely disposed within the stirrup member common thereto.