Abstract: A ventilator/dryer device for drying wet air in a room, the device having a treatment chamber, a rotary drying device and a forced circulation mechanism housed in a case main body provided with an air inlet port and an air outlet port that communicate with the interior of the room. The treatment chamber is divided into a primary side section and a secondary side section with the rotary drying device disposed therebetween. The forced circulation mechanism draws air from the room via the air inlet port to the primary side section of the treatment chamber, passes it through the rotary drying device and sends it back into the room through the secondary side section of the treatment chamber and the air outlet port by means of a single blower. The rotary drying device is adapted to take a drying position, a regenerating position and a heat recovering position sequentially in the sense of its rotation.