which has a conical area 15 which is directed toward the needle shaft and the needle valve opens in the direction of flow against the spring force also this conical area 15 is arranged to cooperate with a valve seat 16 provided on the insert 7 which is disposed as a transitional area between an injection port 17 and a guide bore 18 within the insert 7 the counter support 13 is secured on the end of the valve needle 8 remote from the head 14 in a known manner in order to absorb and transmit the spring forces onto the valve needle 8 the fuel which flows in under pressure acts upon the valve needle 8 and displaces it against the force of the springs 9 and 10 respectively so that the conical area 15 moves away from the valve seat 16 and the injection takes place via the bore 17 after the termination of the supply of fuel under pressure the conical area 15 is pressed back onto the seat 16 by the springs 9 and 10 respectively the fuel flows during injection through a bore 19 provided in the insert 7 to the guide bore 18 of the insert 7 and from there as already described is directed between the valve needle conical area 15 and the valve seat 16 to the injection port 17 adjacent to the conical area 15 on the valve needle is a shoulder 20 which together with the bore 18 defines an annular gap the fuel that flows via the bore 19 must therefore pass first through.