To provide Euglena comprising nutrient such as protein and starch, by using a fuel cell, when sufficient food materials cannot be prepared.SOLUTION: There is provided the Euglena culture system comprising: a fuel cell; a culture device for culturing the Euglena; and a generation water supply part for supplying to the culture device, generation water which is generated following to power generation of the fuel cell.SELECTED DRAWING: Figure 1
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