Abstract: A dryer has a container holding goods to be dried, suction and exhaust ducts communicating with the container, a blower forcibly blowing air through the suction duct, the container and the exhaust duct and a heater for heating air flowing through the suction duct. An absolute humidity sensor is provided to measure a degree of absolute humidity in exhaust air flowing through the exhaust duct. Drying generation of the dryer is interrupted when a measured degree of absolute humidity of the exhaust air and a degree of absolute humidity in the surrounding air has a predetermined relationship.