Inhalation therapy device having - a nebuliser chamber with a fixed wall section and a movable wall section which is movable relative to the fixed wall section of the nebuliser chamber, wherein the movable wall section is designed as a lid for closing the nebuliser chamber, - an aerosol generator arranged in such a way as to emit a generated aerosol into the nebuliser chamber, - an opening in a wall of the movable wall section of the nebuliser chamber, and - a valve which is arranged on the opening in the wall of the movable wall section of the nebuliser chamber, wherein the valve comprises: - a valve seat, - an elastic valve element, and - a valve element positioning device, characterised in that the valve element is attached to the lid, to the fixed wall section or to the valve element positioning device in such a way that (i) in an open state of the lid, - the valve element is spaced apart from the valve seat in such a way that both the valve seat and the valve element and the valve element positioning device are accessible for cleaning without edges or hidden places when the valve element is attached to the lid, or - the valve element is spaced apart from the valve seat in such a way that cleaning of the valve element and valve seat is possible without the occurrence of places critical to cleaning when the valve element is attached to the fixed wall section or to the valve element positioning device; and (ii) in a closed state of the lid, the valve element is positioned in a flow-free state, by the valve element positioning device which is located on one side of the valve element, on the valve seat which is located on an opposite side of the valve element. - a nebuliser chamber with a fixed wall section and a movable wall section which is movable relative to the fixed wall section of the nebuliser chamber, wherein the movable wall section is designed as a lid for closing the nebuliser chamber, - an aerosol generator arranged in such a way as to emit a generated aerosol into the nebuliser chamber, - an opening in a wall of the movable wall section of the nebuliser chamber, and - a valve which is arranged on the opening in the wall of the movable wall section of the nebuliser chamber, - a valve seat, - an elastic valve element, and - a valve element positioning device, (i) in an open state of the lid, - the valve element is spaced apart from the valve seat in such a way that both the valve seat and the valve element and the valve element positioning device are accessible for cleaning without edges or hidden places when the valve element is attached to the lid, or - the valve element is spaced apart from the valve seat in such a way that cleaning of the valve element and valve seat is possible without the occurrence of places critical to cleaning when the valve element is attached to the fixed wall section or to the valve element positioning device; and - the valve element is spaced apart from the valve seat in such a way that both the valve seat and the valve element and the valve element positioning device are accessible for cleaning without edges or hidden places when the valve element is attached to the lid, or - the valve element is spaced apart from the valve seat in such a way that cleaning of the valve element and valve seat is possible without the occurrence of places critical to cleaning when the valve element is attached to the fixed wall section or to the valve element positioning device; and (ii) in a closed state of the lid, the valve element is positioned in a flow-free state, by the valve element positioning device which is located on one side of the valve element, on the valve seat which is located on an opposite side of the valve element.