PROBLEM TO BE SOLVED: To provide a floor slab drainage pipe that can be installed without the need for a dedicated hanger and that has higher corrosion resistance.SOLUTION: A floor slab drainage pipe (10) includes a body (12) that has an inverted truncated cone-shaped main part (12a) and a cylindrical part (12b) arranged below the main part and having a diameter almost equal to a diameter of an undersurface of the main part, and a drainage pipe (14) that is arranged below the body. A through-hole (12d) is provided in the center of the body. A plurality of spacers (12e) are attached at predetermined intervals to an outer surface of the main part of the body.
