PROBLEM TO BE SOLVED: To provide an algae cultivation structure that can be set up by following a surface of a rock in the sea, can be set up in the entire needed region of the cultivation of algae, in which a nutrient source of a far-infrared ray can be provided permanently, and the permanent growth of algae can be achieved surely, the production is also easy, costs can be made to be inexpensive, and to provide a method of manufacturing the same.SOLUTION: The algae cultivation structure is characterized as follows. The algae cultivation structure is a solid matter 2 that is fixed to a surface 1a (1b) of a rock 1, and has a mineral that emits a far-infrared ray to a part to touch a seawater, moreover, a composition before hardening that has a mineral that emits a far-infrared ray at least, and a concrete material is loaded into a prescribed region of the rock 1, then the composition is cured, and is fixed to the rock 1 as the solid matter 2 that has the mineral in a part to touch a seawater.
