To prevent the damage to a device for detecting the release defect of anodes by knock-out pins and to prevent the damage to a defective anode stripping machine and anode stripping machine at the time of casting the anode by a rotary type continuous casting machine.

Release defect detecting plates 11 of a rotary type which detect the rising of a casting mold 3 under turning and the one-side rising of anode hangers in the actuation end points of the knock-out pins 7 of the casting mold 3 of the rotary type continuous casting machine for casting the shoulder type anode are installed in the positions where these plate are not affected by the anode of which the hangers are abnormally risen one-sidedly. This apparatus is so constituted that the release defect of the anode is electrically detectable by an electric signal converter 15 operating cooperatively with such rotary type detecting jig.