A system comprising a dew condensation prevention device for a discharge chute and said discharge chute, wherein the discharge chute is provided in a discharge port of a particulate feeder, wherein: a tip end portion of the discharge chute has a duplex configuration including inverted truncated cone-shaped internal and external chutes (23,24); a space is provided between an outer surface of the internal chute and an inner surface of the external chute, and a first air discharge port that communicates with the space is provided between respective lower ends of the two chutes (23,24); an external chute air input pipe for introducing dry air into the space is connected to the outer peripheral surface of the external chute; characterized in that the dew condensation prevention device comprises: a cylindrical portion having an air reservoir in the interior thereof, which is provided to surround an outer peripheral surface of the external chute, and wherein by providing an opening between an inner peripheral edge of a lower surface of the cylindrical portion and the outer peripheral surface of the external chute in a slightly higher position than the lower end of the external chute, a second air discharge port that communicates with the air reservoir is provided, wherein six projections (27b") projecting in a central direction are provided on the inner peripheral edge of the cylindrical portion at fixed angular intervals and inner end potions of the respective projections 27b" are connected to the outer peripheral surface of the external chute, thereby the second air discharge port is constituted by six arc-shaped slits formed on the lower end of the external chute so as to extend around the outer peripheral surface thereof; and a cylindrical portion air input pipe for introducing dry air into the air reservoir, which is connected to the outer peripheral surface of the cylindrical portion. a tip end portion of the discharge chute has a duplex configuration including inverted truncated cone-shaped internal and external chutes (23,24); a space is provided between an outer surface of the internal chute and an inner surface of the external chute, and a first air discharge port that communicates with the space is provided between respective lower ends of the two chutes (23,24); an external chute air input pipe for introducing dry air into the space is connected to the outer peripheral surface of the external chute; characterized in that the dew condensation prevention device comprises: a cylindrical portion having an air reservoir in the interior thereof, which is provided to surround an outer peripheral surface of the external chute, and wherein by providing an opening between an inner peripheral edge of a lower surface of the cylindrical portion and the outer peripheral surface of the external chute in a slightly higher position than the lower end of the external chute, a second air discharge port that communicates with the air reservoir is provided, wherein six projections (27b") projecting in a central direction are provided on the inner peripheral edge of the cylindrical portion at fixed angular intervals and inner end potions of the respective projections 27b" are connected to the outer peripheral surface of the external chute, thereby the second air discharge port is constituted by six arc-shaped slits formed on the lower end of the external chute so as to extend around the outer peripheral surface thereof; and a cylindrical portion air input pipe for introducing dry air into the air reservoir, which is connected to the outer peripheral surface of the cylindrical portion. a cylindrical portion having an air reservoir in the interior thereof, which is provided to surround an outer peripheral surface of the external chute, and wherein by providing an opening between an inner peripheral edge of a lower surface of the cylindrical portion and the outer peripheral surface of the external chute in a slightly higher position than the lower end of the external chute, a second air discharge port that communicates with the air reservoir is provided, wherein six projections (27b") projecting in a central direction are provided on the inner peripheral edge of the cylindrical portion at fixed angular intervals and inner end potions of the respective projections 27b" are connected to the outer peripheral surface of the external chute, thereby the second air discharge port is constituted by six arc-shaped slits formed on the lower end of the external chute so as to extend around the outer peripheral surface thereof; and a cylindrical portion air input pipe for introducing dry air into the air reservoir, which is connected to the outer peripheral surface of the cylindrical portion.