To provide a drain pipe joint, light-weighted and having excellent fire resisting performance and workability of work.

In this drain pipe joint having a floor slab penetrating part disposed to penetrate a floor slab, a plurality of joint component members are assembled, and among the plurality of joint component members, at least the joint component member constituting the floor slab penetrating part is formed of a fire resisting expansive resin pipe including at least a fire resisting expansive layer made tubular using fire resisting expansive resin composition.