A fuel injector supplying fuel to a combustion chamber of an internal combustion engine, having a main body, a first nozzle needle moveably guided in a first needle guide, a first needle fuel chamber interacting with the first nozzle needle for a first liquid fuel, coupled to the combustion chamber by first channels. The first channels, via first inner openings, are connected to the first needle fuel chamber, having a second nozzle needle moveably guided in a second needle guide, a second needle fuel chamber interacting with the second nozzle needle for a second liquid fuel, coupled via second channels to the combustion chamber. The second channels are connected via second inner openings to the second needle fuel chamber. The first inner openings are arranged on a first circular contour and the second inner openings on a second circular contour extending concentrically about the first circular contour.