PROBLEM TO BE SOLVED: To prevent application of the push-back force of a subject for coupling to an operating part facing the outer periphery by limiting the range of movement of the subject for coupling such as a D-ring.SOLUTION: The animal coupler includes: a body 5 with a bifurcated part 4 close to a distal end 3 side extended from a base part 2 to which a base ring 1 is rotatably coupled a C-shaped coupling ring 6 stored in the body 5 in such a way as swingable in both ways and a spring 8 for energizing the coupling ring 6 in such a way as to hold the ring at a coupling position. A coupling end 6a of the coupling ring 6 advances to an opening part 4a of the bifurcated part 4 from one side 4b of the bifurcated part to be coupled to the subject 7 for coupling to close the opening part 4a, and retreats from the bifurcated part 4 to open the opening part 4a to release the coupling with the subject 7 for coupling. The coupling ring 6 has the operating part 6b facing a side of the body 5 to be operated to retreat to a coupling releasing position against the energization of the spring 8.COPYRIGHT: (C)2012,JPO&INPIT【課題】D環等の連結対象の移動範囲を規制して、外まわりに臨む操作部に連結対象による押し戻し力が及ぶのを防止できるようにする。【解決手段】基部環1が回転自在に連結された基部2から延びた先端部3側に寄って二股部4を形成した本体5、本体5内に往復旋回動できるように収容されて、連結端部6aが二股部4の開放部4aにその一方側4bから連結対象7と連結されるように進出して開放部4aを閉じ、また二股部4から後退して開放部4aを開き連結対象7との連結を解除できるC型の連結リング6、連結リング6を連結位置に保持するように付勢するばね8、を備え、連結リング6は、本体5の側部に臨んでばね8に抗し連結解除位置に後退操作される操作部6bを有して、上記の目的を達成する。【選択図】図2