PROBLEM TO BE SOLVED: To provide a harness for a pet which prevents one cord connection ring from largely moving within the longer facing length to a connection ring while the harness for pet is in use, for example, and prevent a connection part of a cord to the harness for pet from largely rattling or the like.SOLUTION: In the harness for pet, the connection ring 9 to separably connect both connection band members to each other is provided on the side of the other cord connection ring of the connection band member. The connection ring 9 has a rectangular inner shape, having the longer and the shorter facing lengths L1 and L2. The one cord connection ring is inserted through a part of the longer facing length L2, and the one cord connection ring is stopped from coming off at a part of the shorter facing length L1 in the harness for pet. Lock projections 19 and 20 projecting inward are provided in the middle of inner surfaces of the connection ring 9 at parts of the longer facing length L2.COPYRIGHT: (C)2012,JPO&INPIT【課題】 ペット用胴輪の使用中等において接続環に対して他方の引紐連結リングが長い対向寸法内で大きく移動するのを防止できて、引紐のペット用胴輪への連結部分が大きくガタ付いたりするのを防ぐようにする。【解決手段】 連結帯状体の一方の引紐連結リング側に、両連結帯状体を離接可能に接続する接続環9が設けられ、接続環9の内面形状が対向寸法L1,L2に長短を有する四辺形状とされ、長い対向寸法L2の部分で他方の引紐連結リングが挿通可能とされ、短い対向寸法L1の部分で他方の前記引紐連結リングを抜け止めするようにしたペット用胴輪において、接続環9の内面の長い対向寸法L2の部分の中途部に互いに対向するように内方突出した係止凸部19,20が設けられている。【選択図】図1