To provide a structure of a joint capable of changing the extending direction of a pipe conduit from a functional component with a small bending space, being easily connected, reducing the number of pieces of components, and being manufactured at low cost.

At least one of a male part 12 and a female part 60 is composed of an elastically deformable member such as a resin. A connection cylinder 21 at a tip side of the male part is press fit to a columnar seal hole 63 formed at a depth of an inlet 61 of the female part, whereby the sealing performance is secured. When the male part is press fit in the female part to a complete connection position, a circular engagement part having a diameter larger than a connection cylindrical part at the base of the male part is engaged with a circular locking groove 62 formed on an inner peripheral wall near the inlet of the female part and having a diameter larger than the inlet.