PURPOSE: To obtain a solid wire for welding and welding method suitable to weld a high-tension steel sheet.

CONSTITUTION: In this solid wire for welding, one kind of the element which is selected from C, Si, Mn, Ni, Cr, Mo, V, Nb, Ti, Al, Zr, Cu, B, Ca and rare earth element is specified, the balance consists of Fe and the carbon equivalent Weq expressed by the next formula is 0.15-0.7. Formula: Weq=[C]+[Si]/24+[Mn]/6+[Ni]/60+[Cr]/5+[Mo]/4+[V]/14+[Nb]+[Ti]/14. Where, [M] is the content of a component M in the wire (wt.%). Welding is executed by a single pass by using this wire, setting the welding voltage Va in a prescribed range and under the conditions that a welding current is 50-500A and welding speed is 5-250cm/min.