PURPOSE: To obtain a fishnet outstanding in transparency and flexibility, resistant to developing mesh deviation at knotted parts by using conjugate monofilament with each specified melting point difference and sectional area ratio for the core polymer and sheath polymer.

CONSTITUTION: (A) A polyamide polymer such as nylon 6 or nylon 66, 140-180°C in melting point, as the sheath part 2, and (B) a second polyamide polymer with the melting point higher than that of the component A by ≥20°C, as the core part 1, are put to conjugate spinning into polyamide-based conjugate monofilament with the sectional area of the component A accounting for 10-30% of the total sectional area. These monofilaments are then netted and the resulting net is heat-set under tension to effect fusing of knotted parts, thus obtaining the objective fishnet.