The invention harness, industrial safety connected so as to be entered into the safety rope (A) is connected, etc. The seat belt coupling fixed to the fixing member (B) rings in order to prevent the user of the crash, such as in gocheo such as various industrial fields ( as that wishes to provide the 1), wherein the present invention is provided with an external casing 2 formed with a rope fastener which is fastened a safety rope (a) on one side (21), in the circumferential direction inside the outer casing (2) "and the configuration are coupled, the pair of fingers (3) (3 a pair of fingers along the guide hole 22 of the through-arc opposite to the sliding back and forth the circumferential direction (3) (3), the fixing member with) the front end (B) is to form the opening 23 which is intergranular, the outer casing 2, a pair of fingers (3) in the interior (3 ') the opening 23 by the elastic spring (4) is installed to be supported elasticity to the rear closed and, and characterized in that is configured such that a pair of fingers (3) (3 ') works protruding from the outer side pieces (31, 31' by pulling a) to the rear opening 23 is opened, according to the present invention the structure is simple and work piece 31 (31 '), the aperture with a simple action pulling rearward (23) to be able to open making and closing action the usage convenience and product with the reduction of the manufacturing costs by facilitating the operation reliability excellent while It may increase the response rate, thereby improving the durability such as the first floor which can enhance the safety can be expected to a large number of effects.