Provided is a method for manufacturing NKT-cell stimulating dendritic cells, the method including: a step for placing mononuclear cells in a culturing vessel and allowing some of the mononuclear cells to settle on a bottom surface of the vessel by keeping the culture still； a step for removing floating cells other than the cells that have settled on the bottom surface of the culturing vessel； a step for causing monocytes among the cells that have settled on the bottom surface to differentiate into immature dendritic cells by adding a predetermined factor to the culturing vessel； and a step for inducing mature dendritic cells into NKT-cell stimulating dendritic cells by adding α-galactosylceramide to the culturing vessel.
