A welding method includes performing welding to form a weld metal consisting essentially of, in mass %, C: 0.01-0.15%,Si: 0.02-0.6%,Mn: 0.6-3.0%, Al: 0.004-0.08%,Ti: 0.003-0.03%,B: at most 0.005%, Cu: 0-1.2%,Ni: 0-3%,Cr: 0-1.2%, Mo: 0-2%,V: 0-0.05%,Nb: 0-0.05%, and a remainder of Fe and unavoidable impurities. The amounts of impurities are P: at most 0.03%, S: at most 0.03%, N: at most 0.01%, Ca or Mg: at most 0.005%. The value of Pcm expressed by the following Equation (3) is in the range of 0.23-0.35%, and the time T until the weld metal is cooled to 100° C. after welding satisfies the following Equation (1): T(seconds)≧exp(7.0×Pw+4.66)  Equation (1) Pw=Pcm+HD/60  Equation (2) Pcm(mass %)=C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+Mo/15+V/10+5B  Equation (3) HD [ml/100 g]: amount of hydrogen in the weld metal immediately after welding.