Abstract: The invention is related to a method and an apparatus thereof of continuously producing a tubular mantle meat of the cuttlefish, in which the arms of the cuttlefish engaging with one of knife elements provided spaced at a certain distance on an endless chain running continuously is pulled toward a direction contrary to the run of said endless chain, thereby removing at least arms of the cuttlefish along with the viscera affixed to the arms preparing a tubular mantle and in which a skirt end of resultant mantle is aligned along a reference line and in which the skirt end, the fins and a portion of the tubular mantle adjacent to the fins, are cut in a state that the skirt end stands at an aligned position.