The present invention provides a method for producing a chimeric animal using a primed pluripotent stem cell, a tissue stem cell, a progenitor cell, a somatic cell, or a germ cell. The method for producing a chimeric animal according to the present invention comprises introducing a mammal-derived cell into the embryo of a mammal, the cell being primed pluripotent stem cell, tissue stem cell, progenitor cell, somatic cell, or germ cell.