The present invention concerns a speaking valve for fitment on to a tracheostomy cannula, which includes a valve unit and an attachment unit, wherein the attachment unit has a tubular housing having a first and a second end and a longitudinal axis extending from the first to the second end, wherein the first end of the attachment unit can be connected to a connector on the tracheostomy cannula and the valve unit is arranged at the second end of the attachment unit and wherein the valve unit and the attachment unit are connected together movably and preferably releasably. In order to provide an alternative to known speaking valves, in which in spite of using a speaking valve it is possible, insofar as that is desired, to exhale through the tracheostoma by bypassing the valve function, it is proposed according to the invention that the valve unit is so designed and arranged that in a first position it closes the housing of the attachment unit air-tightly with respect to a flow direction, and in at least one second position it permits a flow of air into the housing and out of the housing, wherein the valve unit can be transferred from the first into the at least one second position by a movement parallel to the direction of the longitudinal axis of the tubular housing.
