A high-strength galvanized steel sheet comprising: a steel sheet having a steel composition having a component composition containing, in mass%, C: 0.10% or more and 0.30% or less, Si: less than 1.2%, Mn: 2.0% or more and 3.5% or less, P: 0.010% or less, S: 0.002% or less, Al: 1% or less, N: 0.006% or less, and further optionally containing one or more of: one or more of Ti, Nb, V, and Zr: 0.005 to 0.1% in total, one or more of Mo, Cr, Cu, and Ni: 0.005 to 0.5% in total, B: 0.0003 to 0.005%, one or two selected from Sb: 0.001 to 0.1% and Sn: 0.001 to 0.1%, Ca: 0.0010% or less, the balance is Fe and unavoidable impurities, and a steel structure containing 50% or more of martensite, 30% or less of ferrite, including 0%, and 10 to 50% of bainite, and further containing less than 5%, including 0%, of residual austenite, in terms of area ratio, 30% or more of the martensite being tempered martensite, including self-tempered martensite, an amount of diffusible hydrogen in the steel being 0.20 mass ppm or less; and a galvanizing layer provided on a surface of the steel sheet, having an attachment amount of plating per one surface of 20 to 120 g/m 2 and containing Fe at 8 to 15% in mass%, Al in an amount of 0.0001% to 1.0%, optionally one or more selected from Pb, Sb, Si, Sn, Mg, Mn, Ni, Cr, Co, Ca, Li, Ti, Be, Bi and the REMs at 0 to 30% in total, with the balance being Zn and unavoidable impurities, wherein an amount of Mn oxides contained in the galvanizing layer is 0.050 g/m 2 or less, and a yield strength is 700 MPa or more and a yield strength ratio is 65% or more and less than 85%, where the steel structure, the amount of diffusible hydrogen, the amount of Mn oxides contained in the galvanizing layer, the yield strength and the yield ratio are determined according to the methods specified in the description. a steel sheet having a steel composition having a component composition containing, in mass%, C: 0.10% or more and 0.30% or less, Si: less than 1.2%, Mn: 2.0% or more and 3.5% or less, P: 0.010% or less, S: 0.002% or less, Al: 1% or less, N: 0.006% or less, and further optionally containing one or more of: one or more of Ti, Nb, V, and Zr: 0.005 to 0.1% in total, one or more of Mo, Cr, Cu, and Ni: 0.005 to 0.5% in total, B: 0.0003 to 0.005%, one or two selected from Sb: 0.001 to 0.1% and Sn: 0.001 to 0.1%, Ca: 0.0010% or less, the balance is Fe and unavoidable impurities, and a steel structure containing 50% or more of martensite, 30% or less of ferrite, including 0%, and 10 to 50% of bainite, and further containing less than 5%, including 0%, of residual austenite, in terms of area ratio, 30% or more of the martensite being tempered martensite, including self-tempered martensite, an amount of diffusible hydrogen in the steel being 0.20 mass ppm or less; and a galvanizing layer provided on a surface of the steel sheet, having an attachment amount of plating per one surface of 20 to 120 g/m 2 and containing Fe at 8 to 15% in mass%, Al in an amount of 0.0001% to 1.0%, optionally one or more selected from Pb, Sb, Si, Sn, Mg, Mn, Ni, Cr, Co, Ca, Li, Ti, Be, Bi and the REMs at 0 to 30% in total, with the balance being Zn and unavoidable impurities, wherein an amount of Mn oxides contained in the galvanizing layer is 0.050 g/m 2 or less, and a yield strength is 700 MPa or more and a yield strength ratio is 65% or more and less than 85%, where the steel structure, the amount of diffusible hydrogen, the amount of Mn oxides contained in the galvanizing layer, the yield strength and the yield ratio are determined according to the methods specified in the description. one or more of Ti, Nb, V, and Zr: 0.005 to 0.1% in total, one or more of Mo, Cr, Cu, and Ni: 0.005 to 0.5% in total, B: 0.0003 to 0.005%, one or two selected from Sb: 0.001 to 0.1% and Sn: 0.001 to 0.1%, Ca: 0.0010% or less, the balance is Fe and unavoidable impurities, and a steel structure containing 50% or more of martensite, 30% or less of ferrite, including 0%, and 10 to 50% of bainite, and further containing less than 5%, including 0%, of residual austenite, in terms of area ratio, 30% or more of the martensite being tempered martensite, including self-tempered martensite, an amount of diffusible hydrogen in the steel being 0.20 mass ppm or less; and a galvanizing layer provided on a surface of the steel sheet, having an attachment amount of plating per one surface of 20 to 120 g/m 2 and containing Fe at 8 to 15% in mass%, Al in an amount of 0.0001% to 1.0%, optionally one or more selected from Pb, Sb, Si, Sn, Mg, Mn, Ni, Cr, Co, Ca, Li, Ti, Be, Bi and the REMs at 0 to 30% in total, with the balance being Zn and unavoidable impurities, wherein an amount of Mn oxides contained in the galvanizing layer is 0.050 g/m 2 or less, and a yield strength is 700 MPa or more and a yield strength ratio is 65% or more and less than 85%, where the steel structure, the amount of diffusible hydrogen, the amount of Mn oxides contained in the galvanizing layer, the yield strength and the yield ratio are determined according to the methods specified in the description.