To provide a pipe joint for the housing of vibration isolation capable of using a general purpose pipe material for most drain-pipe systems and also holding a height dimension to a low.

The pipe joint for the housing of vibration isolation connecting a drain-pipe of a building equipped with a base isolation device to a drain main pipe placed in a foundation includes a drain main pipe connecting side member 14 having a drain main pipe connecting short pipe section 12 connected to the drain main pipe and a foundation side plate section 13 circumferentially provided to the outer circumference of the upper end thereof, a drain-pipe connecting short pipe section 15 facing the drain main pipe connecting short pipe section 12 and a drain-pipe connecting side member 17 having a building side expansion plate section 16 circumferentially provided in the horizontal direction from the outer circumference of the lower end thereof. The drain main pipe connecting member 14 is formed of the same hard material as that of the drain main pipe, at the same time, the drain-pipe connecting side member 17 is formed of an expansible rubber, and both members are unified with the outer circumferential part of the plate section.