To provide steel wire for gas shielded arc welding without slipping at the area of a wire supply roller, good in roll supply with low frictional resistance in a conduit tube, hard to remove a lubricant on the wire surface and occurring no chip clogging even when welded under a high current welding condition by using a bent soft and long conduit cable.

This steel wire 3 for gas shielded arc welding contains a lubricant consisting of 10-40 wt.% of one or more of molybdenum disulfide and tungsten disulfide, 5-30 wt.% of one or more of a fatty acid having ≥50°C melting point, a fatty acid ester of a monohydric or dihydric alcohol or a petroleum wax, 10-40 wt.% of one or more of metal soaps and 2-15 wt.% of a slip agent and the rest mainly consisting of a lubricant which is liquid at ordinary temperature on the surface of the wire in an amount of 0.2-1.8 g per 10 kg of the wire 3.