The present invention relates to a method of obtaining a transformed plant cell. The present invention comprises the steps of: (a) co-transforming an intended DNA and a first marker gene into a plant cell and (b) selecting from the transformed cells obtained in the step (a), a transformed plant cell wherein the intended DNA is introduced into a chromosome thereof, and the first marker gene is not introduced , wherein the method does not contain a step to exclude a transformed cell with only the intended DNA introduced into the chromosome by positive selection using the first marker gene.
