A fuel injector for a fuel injection system of an internal combustion engine, comprising: an inlet for fuel; a fuel line connecting the inlet to a valve; an armature being movably arranged between a first and a third position; a valve needle being movably arranged along an axis controlling an opening of the valve; a retainer element being fixed to or in one piece with the valve needle; a first spring element being arranged between the armature and a member (17, 22) of the fuel injector) and biasing the armature away from the retainer element; the first spring element being arranged in a spring receptacle;an actuator for moving the armature from the first position to the third position via a second position, wherein - in the first position, the armature is at a first distance to the retainer element, - in the second position, the armature engages the retainer element to displace the valve needle away from a closing position, - the spring receptacle comprises a first recess of the armature which is hydraulically connected to a further recess of the fuel injector by means of a channel comprised by the armature wherein the spring receptacle comprises a second recess of the member (17, 22) which is hydraulically connected to the further recess by means of a further channel comprised by the member (17, 22), wherein the first spring element is arranged in the first recess and the second recess, wherein the member of the fuel injector is the retainer element and wherein the second recess is embodied as a cylindrical recess in the retainer element, wherein the second recess extends circumferentially around the valve needle, and wherein the first spring element extends circumferentially around the valve needle in the second recess and wherein a disc element is connected with the valve needle, wherein the armature is arranged between the retainer element and the disc element, wherein the armature is biased towards the disc element by the first spring element. an inlet for fuel; a fuel line connecting the inlet to a valve; an armature being movably arranged between a first and a third position; a valve needle being movably arranged along an axis controlling an opening of the valve; a retainer element being fixed to or in one piece with the valve needle; a first spring element being arranged between the armature and a member (17, 22) of the fuel injector) and biasing the armature away from the retainer element; the first spring element being arranged in a spring receptacle;an actuator for moving the armature from the first position to the third position via a second position, wherein - in the first position, the armature is at a first distance to the retainer element, - in the second position, the armature engages the retainer element to displace the valve needle away from a closing position, - the spring receptacle comprises a first recess of the armature which is hydraulically connected to a further recess of the fuel injector by means of a channel comprised by the armature - in the first position, the armature is at a first distance to the retainer element, - in the second position, the armature engages the retainer element to displace the valve needle away from a closing position, - the spring receptacle comprises a first recess of the armature which is hydraulically connected to a further recess of the fuel injector by means of a channel comprised by the armature wherein the spring receptacle comprises a second recess of the member (17, 22) which is hydraulically connected to the further recess by means of a further channel comprised by the member (17, 22), wherein the first spring element is arranged in the first recess and the second recess, wherein the member of the fuel injector is the retainer element and wherein the second recess is embodied as a cylindrical recess in the retainer element, wherein the second recess extends circumferentially around the valve needle, and wherein the first spring element extends circumferentially around the valve needle in the second recess and wherein a disc element is connected with the valve needle, wherein the armature is arranged between the retainer element and the disc element, wherein the armature is biased towards the disc element by the first spring element.