To provide means for identifying a cell suitable for transplantation to cornea, or means for manufacturing a cell cluster suitable for transplantation to cornea using the means.SOLUTION: A method for manufacturing a cell cluster suitable for transplantation to cornea includes: (1) a process of preparing a cell cluster which is cultured under conditions suitable for differentiation induction to a corneal endothelium cell; and (2) a process of measuring expression of at least one type of gene selected from the group consisting of POU6F2, LMX1B, and TFAP2B regarding the cell cluster.SELECTED DRAWING: None