To prevent the breakage of an engaging fitting or a lashing rail, and to keep out of the way of loading/unloading freight.

In the engaging fitting 16, a penetrating port portion 24 is provided on a main body part, and engaging pieces 26, 26 engaged with any engaging hole 14 of the lashing rail 12 are opened. An engaging member 22 has a attaching hole 28 to which a terminal of the lashing belt 10 is attached at one end, and a supporting piece 30 abutting on an outer surface of the lashing rail 12 at the other end. The engaging pieces 26, 26 of the engaging fitting 16 inserting the engaging member 22 into the penetrating port portion 24 are engaged with the engaging hole 14, there by attaching the engaging fitting 16 to the lashing rail 12.