An object of the present invention is to provide a cerebral
organoid derived from a human pluripotent
stem cell, a
cell aggregate including a cerebral cortical
cell, and a method for producing any of them, each being useful for regenerative therapy. The method of the present invention for producing a cerebral
organoid is a method for producing a cerebral
organoid from a pluripotent
stem cell in the absence of a sustentacular
cell, and comprises: (1) a step of culturing the pluripotent
stem cell in a culture solution, wherein the culture solution is substantially free of bFGF and provokes substantially no TGFβ
signal; and (2) a step of inducing the cell obtained in step (1) to differentiate into a
neural cell.