To provide a wall penetration structure of fluid pipe by which connecting operation of the fluid pipe and a joint arranged in the penetration hole is easy and the connection can be confirmed.

The wall penetration structure 3 has the wall penetration member 4 in which the joints 5 are connected to the respective end parts of the first fluid pipe 201 arranged in the penetration hole 1a of the wall 1. In the respective joints 5, 5, the first connecting opening 6 connected to the end parts of the first fluid pipe 201 and the second connecting openings 7 to which the end parts of the second fluid pipes 202 arranged along the wall face 1b are connected are connected via the middle parts 8 having the curved parts 8a. In the one joint 501 of the joints 5, 5, the curved part 8a is curved and formed while swelling out to the opposite side of the second connecting opening 7 so as to move the second connecting opening 7 to the axial center 6a side of the first connecting opening 6. The first connecting opening 6 is formed in the size capable of being inserted into the penetration hole 1a while the first connecting opening 6 faces the penetration direction of the penetration hole 1a. Thereby, the wall penetration member 4 is inserted into the penetration hole 1a from the one of the joint 501 side.