A valve device for a sanitary fitting having at least two control elements which are movable relative to one another and on which at least two inlet channels and at least one control channel are formed is described. The control channel is configured for a communicating connection between at least one of the inlet channels and at least one outlet channel, depending on the relative position of the control elements. According to a first aspect of the invention, an additional channel, which is in a permanent, communicating connection with the control channel, is provided in the valve device, thereby ensuring a communicating connection of the additional channel with at least one of the inlet channels, irrespective of the relative position of the control elements. According to a further aspect of the invention, a sanitary fitting having at least one cold-water inlet connection and at least one hot-water inlet connection is provided, which fitting includes a valve device according to the invention.