PURPOSE: To produce an Al conductor having improved strength without decreasing various characteristics by manufacturing a roughly drawn wire under specific conditions from an Al alloy casting ingot having a specific compsn. and subjecting successively the wire to a heating treatment, cold drawing and heating treatment under specific conditions.

CONSTITUTION: A casting ingot cast by continuous casting and rolling of an alloy contg., by weight, 0.5W1.4% Mg, Mg2Si with excess Si in a range of 0.5W 1.4% Si, 0.15W0.60% Fe and 0.05W1.0% Ni and consisting of the balance Al with ordinary impurities is subjected to primary rolling at 400W550°C and quick cooling followed by secondary rolling at ≤200°C to form a roughly drawn wire. The roughly drawn wire is subjected to a heating treatment for 0.5W20hr at 150W250°C to precipitate fine Mg2Si and is then subjected to ≥60% reduction of area by cold drawing to effect work hardening. The wire is then subjected to a heating treatment for 0.5W20hr at 100W180°C to restore elongation and electrical conductivity without decreasing the strength. The conductor having about ≥40 kg/mm2 tensile strength is obtd.