To obtain a conjugate yarn useful for producing knit products such as tights, socks, etc., which is almost free from fraying, fuzz ball, fluff and a feeling of physical disorder in appearance by winding long fiber around a polyureathane elastic filament or a covered filament obtained by covering the elastic filament as the core member with staple fiber.

This conjugate yarn is obtained by covering the polyurethane elastic filament 1 or a covered filament 3 obtained by winding with the elastic filament as the core filament with nylon-woolie yarn 2, with staple fiber to give the enveloping layer 4, then winding the outer periphery with long fiber 5 such as nylon or polyester, etc., rich in durability. The knit products obtained from this conjugate yarn is excellent in durability, especially durable in the part easy to rubbing such as heel and toe, etc., free from faults such as 'Mekaeshi', thread cast-off because this yarn requests no backside thread.