To provide a wiring/piping device and a wiring/piping material installation structure enabling local deterioration of heat insulation performance to be reduced and wiring/piping materials to be disposed inside and outside a wall, without extending a wiring/piping space.

In a wiring/piping device (100) and a wiring/piping material installation structure (10), a wiring/piping material is inserted through a through-hole formed penetrating between the inside and the outside of a wall (20). The device (100) is provided with a body part (111) installed on the inside of the wall and a drawer part (113) disposed from the body part (111) to the through-hole (21), and comprises: a hollow pipe connection body (110) of which one portion in its whole shape is bent or curved; and a heat insulation spacer (120) having heat insulating property interposed between a part or the whole of a portion of the pipe connection body (110), bent or curved and facing the wall, and the inner surface (20a) of the wall(20).