A fuel injection valve comprising: a housing (2, 3) having an inlet portion, a first fuel passage (11a, 11b) through which high pressure fuel introduced from the inlet portion is supplied to a fuel reservoir chamber communicating with a fuel injection hole and a second fuel passage through which high pressure fuel introduced from the inlet portion is supplied to a pressure control chamber of a back pressure control part; a valve needle movably disposed in the inside of the housing (2, 3) in an advancing and retracting manner; and a control valve performing an open-close control of the fuel injection hole by advancing or retracting the valve needle by adjusting a pressure in the pressure control chamber, wherein the inlet portion is configured such that an inlet connector is mounted in an inlet opening portion formed in the housing (2, 3), the inlet connector having a first axial passage for the high pressure fuel, and wherein a fuel chamber is formed between an end surface portion of the inlet connector and a bottom surface portion of the inlet opening portion, the first fuel passage (11a, 11b) opening at an outer peripheral portion of the bottom surface portion within a region of the fuel chamber, and the second fuel passage opening at a center portion of the bottom surface portion, characterized in that a swirl flow forming portion is fixed to an end of the first axial passage, wherein a second axial passage extending in an axial direction and a plurality of circumferential passages extending in a circumferential direction from the second axial passage and disposed offset from the center of the second axial passage are such formed in the swirl flow forming portion that the high pressure fuel introduced out of the first axial passage into the fuel chamber through the second axial passage and the plurality of circumferential passages forms a swirl flow in a way that a foreign substance mixed into the high pressure fuel moves toward the outer peripheral portion of the fuel chamber due to a centrifugal force and then flows through the first fuel passage (11a, 11b). a housing (2, 3) having an inlet portion, a first fuel passage (11a, 11b) through which high pressure fuel introduced from the inlet portion is supplied to a fuel reservoir chamber communicating with a fuel injection hole and a second fuel passage through which high pressure fuel introduced from the inlet portion is supplied to a pressure control chamber of a back pressure control part; a valve needle movably disposed in the inside of the housing (2, 3) in an advancing and retracting manner; and a control valve performing an open-close control of the fuel injection hole by advancing or retracting the valve needle by adjusting a pressure in the pressure control chamber, wherein the inlet portion is configured such that an inlet connector is mounted in an inlet opening portion formed in the housing (2, 3), the inlet connector having a first axial passage for the high pressure fuel, and wherein a fuel chamber is formed between an end surface portion of the inlet connector and a bottom surface portion of the inlet opening portion, the first fuel passage (11a, 11b) opening at an outer peripheral portion of the bottom surface portion within a region of the fuel chamber, and the second fuel passage opening at a center portion of the bottom surface portion, characterized in that