Drying apparatus and drying method

This drying device comprises: a plurality of drying chambers aligned in a conveying direction of an object to be dried; a partition that divides drying chambers adjacent in the conveying direction and allows drying chambers adjacent in the conveying direction to communicate via through-holes; an object-to-be-dried supply part that supplies the object to be dried into a drying chamber at the upstream end along the conveying direction; a direct heating unit that uses heating gas to directly heat the object to be dried in the plurality of drying chambers; an indirect heating unit that indirectly heats the object to be dried in the plurality of drying chambers; a detection unit that detects the temperature of the object to be dried; and a control unit that, on the basis of the detection result of the detection unit adjusts the rate by which the object to be dried in the plurality of drying chambers is heated by the indirect heating unit; the control unit adjusting the heating rate of the plurality of drying chambers by the indirect heating unit so that the temperature of the object to be dried in the plurality of drying chambers is less than a temperature threshold value.