A composite spinneret for discharging a composite polymer stream composed of an island component polymer and a sea component polymer, comprising one or more distribution plates in which distribution holes and distribution grooves for distributing the polymer components are formed; and a lowermost layer distribution plate positioned to the downstream side of the distribution plate in the direction of the polymer spinning path and provided with a plurality of island component discharge holes and a plurality of sea component discharge holes, wherein the composite spinneret has a plurality of hole groups composed of n (n is a natural number of 3 or more, the same shall apply hereafter) island component discharge holes centered on a virtual center O and arranged on a virtual circular line C1 with a radius R1, n sea component discharge holes centered on the virtual center O and arranged on a virtual circular line C2 with a radius R2, n virtual group centers P centered on a virtual center O and arranged on a virtual circular line C3 with a radius R3, n island component discharge holes centered on the virtual group center P and arranged on a virtual circular line C5 with a radius R1, and n sea component discharge holes centered on the virtual group center P and arranged on a virtual circular line C6 with a radius R2 are present; R1, R2 and R3 satisfy the following expression and: R 1 ≤ R 2 · cos 180 / n degree R 3 = 2 · R 2, and each discharge hole is arranged according to the following conditions, and: C1, C5: n island component discharge holes are arranged equally at a center angle of 360/n degrees C2, C6: n sea component discharge holes are arranged equally at a center angle of 360/n degrees C3: n virtual group centers are arranged equally at a center angle of 360/n degrees θ1: a phase angle between two discharge holes, one arranged on C1 and the other arranged on C2, and one arranged on C5 and the other arranged on C6, is 180/n degrees θ2: a phase angle between the discharge hole on C2 and the virtual group center on C3 is 0 degree, a sea component discharge hole is arranged at a point of intersection of a line segment connecting the virtual center O and the virtual group center P, the virtual circular line C2, and the virtual circular line C6 no sea component discharge hole is arranged on the virtual center O and the virtual group center P. R 1 ≤ R 2 · cos 180 / n degree R 3 = 2 · R 2, and each discharge hole is arranged according to the following conditions, and: C1, C5: n island component discharge holes are arranged equally at a center angle of 360/n degrees C2, C6: n sea component discharge holes are arranged equally at a center angle of 360/n degrees C3: n virtual group centers are arranged equally at a center angle of 360/n degrees θ1: a phase angle between two discharge holes, one arranged on C1 and the other arranged on C2, and one arranged on C5 and the other arranged on C6, is 180/n degrees θ2: a phase angle between the discharge hole on C2 and the virtual group center on C3 is 0 degree, C1, C5: n island component discharge holes are arranged equally at a center angle of 360/n degrees C2, C6: n sea component discharge holes are arranged equally at a center angle of 360/n degrees C3: n virtual group centers are arranged equally at a center angle of 360/n degrees θ1: a phase angle between two discharge holes, one arranged on C1 and the other arranged on C2, and one arranged on C5 and the other arranged on C6, is 180/n degrees θ2: a phase angle between the discharge hole on C2 and the virtual group center on C3 is 0 degree, a sea component discharge hole is arranged at a point of intersection of a line segment connecting the virtual center O and the virtual group center P, the virtual circular line C2, and the virtual circular line C6 no sea component discharge hole is arranged on the virtual center O and the virtual group center P.