To provide a pipe body advancing device allowing a wire to be easily mounted to a hanging accessory without detaching rollers.

The hanging accessory 51 rigidly fixed to each pipe body to be advanced, comprises a roller support member 52 screwed with a nut 50 formed at the pipe body, and a pair of rollers 54, 54 rotatably mounted to the roller support member 52. Support faces 54a, 54a formed in recessed groove shape are formed at the respective rollers 54, 54, and a pair of rollers 54, 54 are arranged at the roller support member 52, with a clearance 59 for inserting through a wire, between the rollers 54, 54. Further, the rollers 54, 54 are provided parallel to the extending direction of the wire 38, and the support faces 54a, 54a support the wire 38 on the opposed sides with the wire 38 in between in the dislocated positions along the extending direction of the wire 38.