A pump head for a metering apparatus for a metered dispensing of a fluid comprising a head part having an outlet opening for the fluid to be dispensed; a part that has a cut-out, a wall bounding the cut-out at one side, and a passage opening introduced into the wall that brings the cut-out directly or indirectly into fluidic communication with the outlet opening of the head part, with the part being indirectly connected to the head part in the direction of the wall, with the head part having an inner surface, a hollow piston having a passage channel that is fit into place in the cutout and is movably guidable up to the wall in the cut-out, characterized in that the passage channel ends in the direction of the wall in an aperture arranged concentrically or eccentrically with respect to an axial projection of the hollow piston and the passage channel is guided in a straight line and concentrically or eccentrically with respect to an axial projection of the hollow piston and the passage opening is arranged offset with respect to the aperture such that the passage opening is closable by the hollow piston on a movement of the hollow piston in the direction of the wall, an elastic valve being comprised that at least regionally has a geometrical configuration corresponding to the inner surface of the head part; and a part being comprised that has a passage opening for the fluid to be dispensed via which in an actuation state an inflow of the fluid between the head part and the elastic valve is made possible while deforming the elastic valve while forming an intermediate space between the elastic valve and the head part, with the head part and the part being connected with shape matching and a force fit while enclosing the elastic seal between the head part and the part and the elastic valve lying over the full area with a shape match on the inner surface of the head part in a storage position of the pump head so that a fluidic seal between the head part and the part is ensured, with the part being connected at its end remote from the elastic seal to the part, and the elastic valve comprises a head and an elastic wall, with the head having a geometrical configuration corresponding to the inner surface of the head part and with the elastic wall being deformable. a head part having an outlet opening for the fluid to be dispensed; a part that has a cut-out, a wall bounding the cut-out at one side, and a passage opening introduced into the wall that brings the cut-out directly or indirectly into fluidic communication with the outlet opening of the head part, with the part being indirectly connected to the head part in the direction of the wall, with the head part having an inner surface, a hollow piston having a passage channel that is fit into place in the cutout and is movably guidable up to the wall in the cut-out, characterized in that the passage channel ends in the direction of the wall in an aperture arranged concentrically or eccentrically with respect to an axial projection of the hollow piston and the passage channel is guided in a straight line and concentrically or eccentrically with respect to an axial projection of the hollow piston and the passage opening is arranged offset with respect to the aperture such that the passage opening is closable by the hollow piston on a movement of the hollow piston in the direction of the wall, an elastic valve being comprised that at least regionally has a geometrical configuration corresponding to the inner surface of the head part; and a part being comprised that has a passage opening for the fluid to be dispensed via which in an actuation state an inflow of the fluid between the head part and the elastic valve is made possible while deforming the elastic valve while forming an intermediate space between the elastic valve and the head part, with the head part and the part being connected with shape matching and a force fit while enclosing the elastic seal between the head part and the part and the elastic valve lying over the full area with a shape match on the inner surface of the head part in a storage position of the pump head so that a fluidic seal between the head part and the part is ensured, with the part being connected at its end remote from the elastic seal to the part, and the elastic valve comprises a head and an elastic wall, with the head having a geometrical configuration corresponding to the inner surface of the head part and with the elastic wall being deformable.