The present invention aims to provide a novel Agrobacterium-mediated method for producing a transformed plant.The method of the present invention is an Agrobacterium-mediated method for producing a transformed plant, which comprises:(i) a coculture step for culturing an Agrobacterium-inoculated plant material with a coculture medium and(ii) a regeneration step for culturing the tissue obtained in (i) with a regeneration medium, either without callus growth culture or after callus growth culture, to thereby regenerate a whole plant,wherein 1) said method comprises transformation enhancement, andwherein 2) said method does not comprise selection of transformed cells based on the properties of a nucleic acid to be introduced by Agrobacterium in any step from coculture to regeneration.
