The invention relates to a single-lever, timed mixer tap comprising a push-button that makes it possible to control the passage of water between at least one water-supply inlet, in particular two inlets for hot water and cold water, respectively, and at least one outlet for the mixed water, a mixing block having a portion that is rotatably movable in relation to a stationary portion in order to vary the temperature of the mixed water, and a timer cartridge, characterised in that the mixing block and the timer cartridge are mounted separately from one another and the push-button is mounted translatably and rotatably movable, and in that at least one member for transmitting the movement of the push-button is provided, which is designed to transmit a translational movement to an actuator rod of the timer cartridge as well as a rotational movement to the movable portion of the mixing block.