This steel sheet has a specified chemical composition. In Fourier transform-infrared spectroscopy using reflection absorption spectroscopy, the surface exhibits an absorption peak with a reflectance of 50% to 85% inclusive in the wave number range of 1200 cm-1 to 1300 cm-1, and does not exhibit an absorption peak in the wave number range of 1000 cm-1 to 1100 cm-1 or exhibits an absorption peak with a reflectance of 85% or more in the wave number range of 1000 cm-1 to 1100 cm-1. Ni adheres to said surface in the amount of 3 mg/m2 to 100 mg/m2.
