An electron-beam welded joint having a welded metal and obtainable by applying an electron beam to a steel, the steel having a composition consisting of, by mass%: C: 0.02% to 0.10%; Si: 0.03% to 0.30%; Mn: 1.5% to 2.5%; Ti: 0.005% to 0.015%; N: 0.0020% to 0.0060%; O: 0.0010% to 0.0035%; Nb: 0% to 0.020%; V: 0% to 0.030%; Cr: 0% to 0.50%; Mo: 0% to 0.50%; Cu: 0% to 0.25%; Ni: 0% to 0.50%; B: 0% to 0.0030%; S: limited to 0.010% or less; P: limited to 0.015% or less; Al: limited to 0.004% or less; Mg: limited to 0.0002% or less; and Ca: limited to 0.0002% or less, with a balance consisting of iron and inevitable impurities, wherein an index value CeEBB obtained by substituting the composition of the steel into following Formula 1 falls in the range of 0.42% to 0.65%, a number of oxide having an equivalent circle diameter of 1.0 μm or more is 20 pieces/mm 2 or less at a thickness center portion in cross section along a thickness direction of the steel, a number of oxide containing Ti of 10% or more and having an equivalent circle diameter of 0.05 μm or more and less than 0.5 μm falls in the range of 1×10 3 to 1×10 5 pieces/mm 2 in the thickness center portion, the number of the oxide containing Ti of 10% or more and having an equivalent circle diameter of 0.05 μm or more and less than 0.5 μm being measured by using FE-TEM at a magnification of 10000-fold to 1000000-fold, a C/CeEBB, which is a ratio of the amount of C by mass% in the steel relative to the index value CeEBB, falls in the range of 0.02 to 0.13, the welded metal has a composition consisting of, by mass%: C: 0.02% to 0.10%; Si: 0.03% to 0.30%; Mn: 1.2% to 2.4%; Ni: 1.0% to 2.3%; Ti: 0.005% to 0.015%; N: 0.0020% to 0.0060%; O: 0.0004% to 0.0020%; Nb: 0% to 0.020%; V: 0% to 0.030%; Cr: 0% to 0.50%; Mo: 0% to 0.50%; Cu: 0% to 0.25%; B: 0% to 0.0030%; S: limited to 0.010% or less; P: limited to 0.015% or less; Al: limited to 0.004% or less; Mg: limited to 0.0002% or less; and Ca: limited to 0.0002% or less, with a balance consisting of iron and inevitable impurities, and an index value CeEBW obtained by substituting the composition of the welded metal into following Formula 2 falls in the range of 0.56 to 0.73%, CeEBB=C+ 1/4 Mn+ 1/15 Cu+ 1/15 Ni+ 1/5 Cr+ 1/5 Mo+ 1/5 V where C, Mn, Cu, Ni, Cr, Mo, and V represent mass% of elements contained in the composition of the steel, CeEBW=C+ 1/4 Mn+ 1/15 Cu+ 1/15 Ni+ 1/5 Cr+ 1/5 Mo+ 1/5 V where C, Mn, Cu, Ni, Cr, Mo, and V represent mass% of elements contained in the composition of the welded metal. C: 0.02% to 0.10%; Si: 0.03% to 0.30%; Mn: 1.5% to 2.5%; Ti: 0.005% to 0.015%; N: 0.0020% to 0.0060%; O: 0.0010% to 0.0035%; Nb: 0% to 0.020%; V: 0% to 0.030%; Cr: 0% to 0.50%; Mo: 0% to 0.50%; Cu: 0% to 0.25%; Ni: 0% to 0.50%; B: 0% to 0.0030%; S: limited to 0.010% or less; P: limited to 0.015% or less; Al: limited to 0.004% or less; Mg: limited to 0.0002% or less; and Ca: limited to 0.0002% or less, C: 0.02% to 0.10%; Si: 0.03% to 0.30%; Mn: 1.2% to 2.4%; Ni: 1.0% to 2.3%; Ti: 0.005% to 0.015%; N: 0.0020% to 0.0060%; O: 0.0004% to 0.0020%; Nb: 0% to 0.020%; V: 0% to 0.030%; Cr: 0% to 0.50%; Mo: 0% to 0.50%; Cu: 0% to 0.25%; B: 0% to 0.0030%; S: limited to 0.010% or less; P: limited to 0.015% or less; Al: limited to 0.004% or less; Mg: limited to 0.0002% or less; and Ca: limited to 0.0002% or less,