To provide a construction method of a resin pipe capable of securing quality of pipeline and also improving work efficiency, and a jig used in the method.SOLUTION: A connection jig 10 comprises a pair of split ring-shaped split bodies 12, and when connection parts 22 of the pair of split bodies are connected to each other, an inside edge is formed into a round shape. While a state where connection jig is externally fitted to a connection side end part of a resin pipe 100 and the resin pipe is corrected into a round shape is kept, an external surface of the connection side end part of the resin pipe is cut by a cutting jig 102.SELECTED DRAWING: Figure 13
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