To improve operability in mounting work of a cover and a protecting tube.

In a cover 20, an elastically deflectable lock part 27 is provided, in this lock part 27, a corrugated tube (protecting tube) 30 is locked, and its axial direction play is regulated. In the case of mounting, relating to the cover 20 previously mounted in a connector housing 10 to provide a cylindrical shape, the corrugated tube 30 is moved in an axial direction to be inserted to the cover 20 from rearward. Then, the lock part 27, while elastically deflected, permits insertion, when leading to a prescribed lock position, the corrugated tube 30 is locked to the lock part 27, and in this way, mounting is completed. In the case of mounting the corrugated tube 30, by eliminating necessity for position alignment relating to the lock part 27, workability is excellent.