In this paper, the hydrogen osmosis test and the mechanical tensile test were carried out to examine hydrogen cracking behavior of STS444 with welding conditions. In $0.5MH_2SO_4+0.001M ;As_2O_3$ solution, the hydrogen embrittlement characteristics of weld zone of STS444 added to load of $1,400 kg/cm^2$ together with hydrogen osmosis by current of $30mA/cm^2$ for 60 min. was considered. As a result of study on the hydrogen embrittlement and mechanical characteristics of STS444외와 with welding conditions the tensile stress and elongation of STS444 get lower by the absorption of oil or water before welding. Also, the reduction rate of tensile stress and elongation of STS444 is larger because of hydrogen embrittlement by the absorption of oil or water. STS444 by the absorption of water before welding is more sensitive to hydrogen embrittlement than oil.