Respiratory assistance device suitable for Auto CPAP respiratory therapy. The respiratory assistance device includes: a blower device including a blower configured to generate pressurized air an operation device including an operation interface configured to control the blower a wireless or wired communication arrangement configured to connect the blower device and the operation device an attachment part configured to be attached to a head of a patient so as to supply the pressurized air to an airway of the patient and an air tube through which the pressurized air is introduced into the attachment part from the blower device. The blower device is accommodated in a blower device casing, and the operation device is accommodated in an operation device casing separate from the blower device casing.
