PURPOSE: To easily and highly reliably connect a corrugated sheath pipe cut halfway without using a joint by cutting the middle part of a faucet part and an insertion part at a non-corrugated pipe part which is formed by a combination of a successive faucet part and insertion part at specified intervals.

CONSTITUTION: A length-short sheath pipe or residual sheath pipe P1 (or P2) and a supplementary sheath pipe P2 (or p1) are both out at a stepped place of a non-corrugated pipe part to form connecting end parts, a faucet part 3, being one end part and an insertion part 4 the other end part respectively. An adhesive is applied to the inner surface of the faucet part 3 or the outer surface of the insertion part 4, and then the insertion part 4 is pressed in the faucet part 3. This enables both the P1 and P2 to be irrotationally and easily connected without using a specific joint.