Abstract: The object of the present invention is a modular drier.Each module comprises two fans each supplying a common diffusion chamber (14) disposed between two columns of a group of columns (12, 13). Said chambers (14) adjoin a perforated wall of said columns comprising vertical deflectors, with the opposite wall of these columns, likewise perforated, communicating with a common chamber (15) for exhausting the air used for drying.The invention relates to a modular drier for drying grains, in which gravity draws the grain down in parallel sheets within vertical columns crossed horizontally by the drying air.