Method for producing a transgenic cell

The present invention, (1) fibronectin or vector carrying step of culturing a cell population containing progenitor cells of T cells and / or T cells in a vessel containing the fragments and a CD3 ligand, and (2) a desired gene adding to the vessel of step (1), Characterized in that it comprises a method for producing a desired gene is introduced the cell population is provided. By carrying out the both steps in the same container, gene transfer with high efficiency is achieved.