PROBLEM TO BE SOLVED: To provide a grain drier capable of reducing the maintenance load by easily cleaning/removing deposit dust while ensuring a cereal grain dehydration efficiency by a far-infrared radiator.SOLUTION: A grain drier comprises: hot air and ventilation chambers opposite to each other across a grain drying passage arrayed from a frame front face wall (31) to a back wall; a burner case (6) that is provided to extend from the front face wall (31) in front and that supplies a hot blast to the hot air chamber; and an absorption discharge part that is provided on the back wall and that can suck and decompress the ventilation chamber, in which a far-infrared radiator is provided on the front face wall (31) of the ventilation chamber; a window is opened at its directly lower position; a slit plate (33a) formed in the window and having a plurality of slits, the slits enabling outside air to flow, and a blind plate (33b) that can open/close the slit plate (33a), thereby facilitating cleaning/removal of d
