To provide a pipe coupling tool capable of easily determining the connection posture with respect to a first pipe, and capable of maintaining and fixing the connection posture without accidentally moving upon attachment of a second pipe in the pipe connection tool used for adjacently piping the second pipe to the first pipe which is an annular recessed and projecting wavy pipe wherein a large part having a rectangular cross section and a small part having a circular cross section are alternately arranged along a pipe axial direction.

This pipe coupling tool for adjacently piping the second pipe P2 to the first pipe P1 wherein the large parts 51 having a rectangular cross section and the small parts 52 having a circular cross section are alternately arranged along the pipe axial direction is provided with connection parts 2 and 3 to the small part 52 of the first pipe P1 and the second pipe P2 on both sides opposed through an intermediate part 1, and the intermediate part 1 is provided with an abutting part 4 projecting to the width direction of the connection parts 2 and 3.