A drying apparatus, comprising: a conveyor which conveys a printing medium having a recording surface and a non-recording surface opposite to the recording surface, an aqueous ink adhering to the recording surface, a preceding-stage dryer (7a, 7b) which dries the printing medium being conveyed by the conveyor; and a next-stage dryer (7c, 7d) which dries the printing medium being conveyed by the conveyor on a side downstream of the preceding-stage dryer (7a, 7b) in a moving direction of the printing medium conveyed by the conveyor, a housing in which the conveyor, the preceding-state dryer (7a, 7b) and the next-stage dryer (7c, 7d) are arranged, wherein: the preceding-stage dryer (7a, 7b) includes a plurality of first nozzles arrayed in the moving direction of the printing medium conveyed by the conveyor on the recording surface side of the printing medium and a plurality of rotary bodies arrayed in the moving direction of the printing medium conveyed by the conveyor on the non-recording surface side of the printing medium, the first nozzles inject a hot wind of 60°C or higher to the recording surface, the rotary bodies have peripheral surfaces configured to contact the non-recording surface of the printing medium and rotate, following the printing medium, the next-stage dryer (7c, 7d) includes a plurality of second nozzles arrayed in the moving direction of the printing medium conveyed by the conveyor on the recording surface side of the printing medium and a plurality of third nozzles arrayed in the moving direction of the printing medium conveyed by the conveyor on the non-recording surface side of the printing medium, the second nozzles inject the hot wind to the recording surface, the third nozzles inject the hot wind to the non-recording surface, characterized in that the housing includes an exhaust unit (8a, 8b) which exhausts the air in the housing to outside of the housing. a conveyor which conveys a printing medium having a recording surface and a non-recording surface opposite to the recording surface, an aqueous ink adhering to the recording surface, a preceding-stage dryer (7a, 7b) which dries the printing medium being conveyed by the conveyor; and a next-stage dryer (7c, 7d) which dries the printing medium being conveyed by the conveyor on a side downstream of the preceding-stage dryer (7a, 7b) in a moving direction of the printing medium conveyed by the conveyor, a housing in which the conveyor, the preceding-state dryer (7a, 7b) and the next-stage dryer (7c, 7d) are arranged, wherein: the preceding-stage dryer (7a, 7b) includes a plurality of first nozzles arrayed in the moving direction of the printing medium conveyed by the conveyor on the recording surface side of the printing medium and a plurality of rotary bodies arrayed in the moving direction of the printing medium conveyed by the conveyor on the non-recording surface side of the printing medium, the first nozzles inject a hot wind of 60°C or higher to the recording surface, the rotary bodies have peripheral surfaces configured to contact the non-recording surface of the printing medium and rotate, following the printing medium, the next-stage dryer (7c, 7d) includes a plurality of second nozzles arrayed in the moving direction of the printing medium conveyed by the conveyor on the recording surface side of the printing medium and a plurality of third nozzles arrayed in the moving direction of the printing medium conveyed by the conveyor on the non-recording surface side of the printing medium, the second nozzles inject the hot wind to the recording surface, the third nozzles inject the hot wind to the non-recording surface, characterized in that the housing includes an exhaust unit (8a, 8b) which exhausts the air in the housing to outside of the housing. the preceding-stage dryer (7a, 7b) includes a plurality of first nozzles arrayed in the moving direction of the printing medium conveyed by the conveyor on the recording surface side of the printing medium and a plurality of rotary bodies arrayed in the moving direction of the printing medium conveyed by the conveyor on the non-recording surface side of the printing medium, the first nozzles inject a hot wind of 60°C or higher to the recording surface, the rotary bodies have peripheral surfaces configured to contact the non-recording surface of the printing medium and rotate, following the printing medium, the next-stage dryer (7c, 7d) includes a plurality of second nozzles arrayed in the moving direction of the printing medium conveyed by the conveyor on the recording surface side of the printing medium and a plurality of third nozzles arrayed in the moving direction of the printing medium conveyed by the conveyor on the non-recording surface side of the printing medium, the second nozzles inject the hot wind to the recording surface, the third nozzles inject the hot wind to the non-recording surface, characterized in that the housing includes an exhaust unit (8a, 8b) which exhausts the air in the housing to outside of the housing.