A cell culture base material for trait induction control of mesenchymal stem cells including an uneven pattern on a surface to which cells adhere and of which the width of the unevenness is greater than or equal to 50 nm and less than 1,000 nm. A trait control method of mesenchymal stem cells includes culturing mesenchymal stem cells on the cell culture base material for trait induction control of mesenchymal stem cells.
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