The present invention relates to a method for obtaining transformed cells of a plant. The present invention includes the following steps: (a) a step of co-transforming a desired DNA and a first marker gene into a plant cell; and (b) among the transformed plant cells obtained in step (a). , Including a step of selecting a transformed cell into which a desired DNA has been introduced into the chromosome and into which the first marker gene has not been introduced, provided that only the desired DNA is obtained by positive selection using the first marker gene. It does not include the step of removing transformed cells introduced into the chromosome.本発明は、植物の形質転換細胞の取得方法に関する。本発明は、以下の工程: (a)所望のDNAと第1マーカー遺伝子とを、植物細胞に共形質転換する工程;及び (b)工程(a)で得られた形質転換植物細胞の中から、染色体に、所望のDNAが導入され、かつ、第1マーカー遺伝子が導入されていない形質転換細胞を選択する工程を含み、 但し、前記第1マーカー遺伝子を用いたポジティブ選抜によって、所望のDNAのみが染色体に導入された形質転換細胞が除去される工程は含まない。