To manufacture an overlap type corrugated tube by using a blow molding method as a molding method of the tube put into a practical use at present.

This corrugated tube is obtained by rounding a tape-like main member 1 in a cylindrical state to a cylinder having overlapped side edges, disposing a thin tape 2 of the same material along its inside, and preventing leakage of pressurized fluid from the duplicated side edges of the main member. And, an overlap type corrugated tube is manufactured by a blow molding method while bringing the members into close contact with a holder such as a brush 3.