To enhance a versatility of a housing device of a splice part of a wire harness.

In the housing device for collectively holding a plurality of splice part taken out from a trunk line of the wire harness, a holding block made of extensible rubber or elastomer is disposed, the holing block are recessed by a large number of splice part inserting holes with intervals, and respective splice parts are held by insertion while expanding respective splice part insertion holes. A case with a lid made of hard resin for housing the holding block is disposed, and also a pair of projections are disposed on opposed sides of a peripheral wall of the case. The lid is joined to an upper end of one projection through a hinge, and a locking part and a part to be locked for locking a tip part of the lid to the other projection when the lid is closed, is arranged. Wires connected to the splice parts are taken out from the gap between the peripheral wall upper end of the case and the pressing lid formed when the lid is closed.