An injector for injecting a fluid, including a valve seat, on which a sealing area is situated, and a closing element, which is situated on an injector center line and which, on the valve seat, releases and closes at least one through-opening, the at least one through-opening having a main axis at an angle of inclination with respect to the injector center line, the at least one through-opening having an inflow area, and the inflow area having a tapering design.