To provide a hopper device for the moisture-free drying of a molding material which can dry the molding material efficiently in a short time period while keeping the temperature of dry air proper.

The moisture-free drying hopper device 1 has a material dropping space part 5 which drops the molding material M from a material charging inlet 4 in a body 2, a rotary screw body 14 which has a screw shaft body 6a connecting a net-shaped shaft part 6b and a round rod-shaped shaft part 6c with each other and a screw blade 13 and is rotated/driven, a screw blade surrounding body 15 which surrounds the rotary screw body 14, a drying screw hopper part 6 which makes the molding material M and heated dry air be counter currently brought into contact with each other in the screw surrounding body 15 to carry out the moisture-free drying of the molding material M, a weight metering hopper part 7 which carries out the metering and downward discharge of the molding material M, and a suction discharge mechanism part 8 which sucks air, water, powder, etc., accompanying the moisture-free drying of the molding material M from the upper end of the net-shaped shaft part 6b under the action of compressed air from the outside and discharges them to the outside of the body.