A device for inserting into a tracheostoma prosthesis or a thracheostoma plaster comprises a cylindrical housing and a cylindrical valve element, the housing is provided with a first opening for the connection to the stoma of the patient and with at least one second opening on the opposite side, and the valve element in the second opening of the housing is provided to close the second opening . The valve element is configured so that it can be closed manually by means of a finger and can he opened by elastic return, and the housing surrounds the valve element and the valve element receives a moisture and heat exchanging filter. A cylindrical spring element is arranged between the housing and the valve element.
