The present invention relates to a CPAP device and a blower unit, and achieves the compatibility between reductions in size and in weight and noise reduction in a high order. A blower unit 10 includes a casing 11 including an air suction port 111, a fan 50 which has an air receiving port 531 and an air sending port 542, is provided with a fluid dynamic bearing, causes air to be suctioned from the air suction port 111 to receive the air from the air receiving port 531 and sends out the air from the air sending port 542, and an emission silencer 17 which is coupled to the air sending port 542 and reduces sounds as the air flows which air is sent out from the air sending port 542 by the fan 50.
