PURPOSE: To obtain a resin composite pipe with a TS socket having well-featured appearance by cutting in the outer layer constituting material of the abutted part of both TS sockets while cutting the center thereof along with a pipe and releasing a release film to separate the pipe into a resin composite pipe having an insertion port part at one end thereof and a receiving port at the other end thereof.

CONSTITUTION: The outer layer constituting material layer 20 between the TS sockets W, W being the connection region of a resin composite pipe E, that is, at the position of the central part in the axial direction of a connection short pipe T is cut in by a cutter 4 until reaching the outer peripheral surface of the connection short pipe T while the central part in the axial direction of the wound part of the release film Y of the resin composite pipe E is cut along with the outer layer constituting material layer 20 and the outer layer constituting material layers Y of both ends of the release film Y are cut in. The release film Y after cutting-in is released from the pipe to form an insertion port part (f) at this part. Next, an adhesive is applied to the inner surface of the TS socket W at one end of one resin composite pipe and, when the insertion port part (f) of the other resin composite pipe is inserted in the TS socket W, the adhesive is cured to fix the insertion port part (f) to the TS socket W in an inserted state and the resin composite pipes F, F are strongly connected each other.