Abstract: The present invention relates to the field of mechanical-ventilation devices, in particular devices that enable drugs to be fed into the airflow, generated by the ventilation device and directed to the respiratory pathways of a patient, using an aerosol dosing device and/or nebulizer. Specifically, the invention relates to an inhalation chamber (1) to be built into a circuit of a mechanical-ventilation respiratory device (100) through which a gas stream is to pass, said inhalation chamber (1) consisting of two portions on either side of the longitudinal axis (A) thereof, and comprising openings that lead into the inner space (Vi) thereof, wherein two openings (10, 11) are to be connected to the circuit of the respirator, i.e.