A fluid supply pipe according to an embodiment of the invention includes an internal structure and a pipe body (40) configured to house the internal structure. The pipe body (40) has an inlet and an outlet. The fluid supply pipe is characterized in that the internal structure includes a first internal structure (20, 200, 210, 220, 230, 240, 250, 1200) and a second internal structure (30, 300, 310, 320, 330, 340, 350, 1300). The first internal structure includes a head portion (22, 1022) including a plurality of spiral vanes, and a body portion (24, 1024) positioned downstream from the head portion and including a plurality of protrusions on its outer circumferential surface. The second internal structure formed in a hollow shaft shape includes a head portion (31, 1031) including a plurality of spiral vanes, and a body portion (33, 1033) positioned downstream from the head portion and including a plurality of protrusions on its outer circumferential surface. At least a part of the first internal structure is housed in the hollow of the second internal structure.