A coupling frame formed at a connecting portion on an out-port side of a first safety valve, and a coupling frame formed at a connecting portion on an in-port side of a second safety valve are brought into contact with each other, Safety Valves directly or by causing a plate-shaped member to intervene in between. Coupling projections, facing each other, formed in the coupling frame of both the safety valves are sandwiched between a pair of latch portions of a latch member, and a pair of latch members facing each other,Bellow Seal Valve are mutually drawn by tightening rod members. The coupling projections of both the safety valves are thereby pressed in a mutually approaching direction with the latch portions of each of both the latch members, and thereby both the safety valves are coupled.GLOBE VALVE A combined safety valve comprising: a first safety valve formed of a pilot-type three-port valve; and a second safety valve formed of a pilot-type three-port valve, the first and second safety valves being separatably coupled via a connecting implement in a condition of communicating an out-port of the first safety valve and an in-port of the second safety valve, wherein a first connecting portion on an out-port side of the first safety valve includes a first coupling frame fixed to a first valve body, the first coupling frame being a separate component from the first valve body, a first connecting surface being located on the first coupling frame where the out-port is opened, and first coupling projections being located on both side end portions of the first connecting surface, respectively, wherein a second connecting portion on an in-port side of the second safety valve includes a second coupling frame fixed to a second valve body, the second coupling frame being a separate component from the second valve body, a second connecting surface being located on the second coupling frame where the in-port is opened, and second coupling projections being located at a position corresponding to the first coupling projections of the first safety valve, on both side end portions of the second connecting surface, respectively, wherein the connecting implement includes a plate-shaped member intervening between the first coupling frame and the second coupling frame, and a coupling member for coupling the first coupling frame and the second coupling frame, wherein the plate-shaped member includes a continuous hole for communication between the out-port and the in-port, and contacting surfaces where the first connecting surface on the out-port side and the second connecting surface on the in-port side are adjoined, and wherein the coupling member fixes the first and second coupling projections of the first coupling frame and the second coupling frame, which face each other, by tightening in a mutually approaching direction.

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