To provide a specific pipe fitting capable of eliminating work of selecting a predetermined engagement member attached to the pipe fitting, improving the work efficiency when attaching the engagement member, attaching the engagement member by only one-touch operation with fingertips of one hand, realizing attachment stability such that the attached engagement member does not easily fall away, covering sharp portions at the top ends of support legs of the pipe fitting, and eliminating the risk of damage or disconnection of pipes or the like.

In the pipe fitting, the support legs are formed by bending the top end portions of a pair of arm parts having shapes symmetrical with each other and extending from a substantially U-shaped base part. Each arm portion has window holes 11f in which flanges of the pipes are fitted in when fastening the pipe fitting. The pipe fitting 50 includes the engagement member 1 connected to one of the support legs in such a manner that one end of the engagement member is freely movable.