To provide a convenient and quick transgenic technique that can be applied to various plants including the plant species and varieties for which tissue culture is difficult.SOLUTION: There is provided a method for producing a transgenic plant body, including inoculating a shoot apex of a seed embryo with Agrobacterium to grow the seed embryo.SELECTED DRAWING: None【課題】組織培養が困難な植物種および品種を含む様々な種類の植物に適用できる、簡便かつ迅速な形質転換技術を提供すること。【解決手段】種子胚の茎頂にアグロバクテリウムを接種し、該種子胚を生長させることを特徴とする、形質変換植物体の生産方法が提供される。【選択図】なし