To provide a pipe-lining method rehabilitating and preventing corrosion of a pipe, by lining even for a large bore and long pipe with high workability, in a short time.

A plastic pipe 1, having the length shorter than the entire length of the pipe line 10 and an outside diameter smaller than the inside diameter of the pipe line 10, is formed inside the pipe line 10, the plastic pipe 1 is moved inside the pipe line 10 to connect multiple plastic pipes 1 together, and a grouting material is filled between the connected multiple plastic pipes 1 and the pipe line 10 and is hardened.