A tracheostoma valve to be applied to a tracheostomized person's neck comprises an air passage to be connected with the tracheostoma for connecting the trachea with the surroundings. A valve member is provided in the air passage, wherein the valve member is normally open and allows for inhalation and exhalation through the air passage. The valve further comprises a manually activated member for establishing an uninterrupted seal to block patient exhalation, thereby to direct it to the patient's pharynx, esophagus, sinuses, and mouth for speech following surgical removal of the larynx.