Disclosed is a G-protein coupled receptor 40 (GPR40)-positive bone marrow-derived mesenchymal stem cell which can be differentiated into a neural cell when induced with a polyunsaturated fatty acid (PUFA). Specifically disclosed are: a GPR40-positive bone marrow-derived mesenchymal stem cell which is derived from a mammal; and a CD29-positive, CD90-positive, CD73-positive, CD105-positive, CD3-negative, CD4-negative, CD8-negative, CD14-negative, CD34-negative, CD45-negative and CD31-negative bone marrow-derived mesenchymal stem cell.
GPR40-POSITIVE BONE MARROW STEM CELL