A high-yield-ratio high-strength electrogalvanized steel sheet having a yield ratio of 0.80 or more and a tensile strength of 1320 MPa or more in the rolling direction and measured according to the description with a JIS No.5 test piece, comprising an electrogalvanized coating layer formed on a surface of a base steel sheet, wherein the base steel sheet has a chemical composition containing, by mass%, C: 0.14% or more and 0.40% or less, Si: 0.001% or more and 2.0% or less, Mn: 0.10% or more and 1.70% or less, P: 0.05% or less, S: 0.0050% or less, Al: 0.01% or more and 0.20% or less, N: 0.010% or less, optionally one, two, or more selected from B: 0.0002% or more and less than 0.0035%, Nb: 0.002% or more and 0.08% or less, Ti: 0.002% or more and 0.12% or less, Cu: 0.005% or more and 1% or less, Ni: 0.01% or more and 1% or less, Cr: 0.01% or more and 1.0% or less, Mo: 0.01% or more and less than 0.3%, V: 0.003% or more and 0.5% or less, Zr: 0.005% or more and 0.20% or less, W: 0.005% or more and 0.20% or less, Ca: 0.0002% or more and 0.0030% or less, Ce: 0.0002% or more and 0.0030% or less, La: 0.0002% or more and 0.0030% or less, Mg: 0.0002% or more and 0.0030% or less, Sb: 0.002% or more and 0.1% or less and Sn: 0.002% or more and 0.1% or less and a balance of Fe and inevitable impurities, a steel microstructure, in which a total area fraction of one or both of bainite containing carbides having an average grain diameter of 50 nm or less and tempered martensite containing carbides having an average grain diameter of 50 nm or less is 90% or more in a whole of the steel microstructure, and in which a total area fraction of one or both of bainite containing carbides having an average grain diameter of 50 nm or less and tempered martensite containing carbides having an average grain diameter of 50 nm or less is 80% or more in a region from the surface of the base steel sheet to a position located at 1/8 of a thickness of the base steel sheet, and diffusible hydrogen in steel in an amount of 0.20 mass ppm or less, the microstructure and the diffusible hydrogen being measured according to the description. the base steel sheet has a chemical composition containing, by mass%, C: 0.14% or more and 0.40% or less, Si: 0.001% or more and 2.0% or less, Mn: 0.10% or more and 1.70% or less, P: 0.05% or less, S: 0.0050% or less, Al: 0.01% or more and 0.20% or less, N: 0.010% or less, optionally one, two, or more selected from B: 0.0002% or more and less than 0.0035%, Nb: 0.002% or more and 0.08% or less, Ti: 0.002% or more and 0.12% or less, Cu: 0.005% or more and 1% or less, Ni: 0.01% or more and 1% or less, Cr: 0.01% or more and 1.0% or less, Mo: 0.01% or more and less than 0.3%, V: 0.003% or more and 0.5% or less, Zr: 0.005% or more and 0.20% or less, W: 0.005% or more and 0.20% or less, Ca: 0.0002% or more and 0.0030% or less, Ce: 0.0002% or more and 0.0030% or less, La: 0.0002% or more and 0.0030% or less, Mg: 0.0002% or more and 0.0030% or less, Sb: 0.002% or more and 0.1% or less and Sn: 0.002% or more and 0.1% or less and a balance of Fe and inevitable impurities, C: 0.14% or more and 0.40% or less, Si: 0.001% or more and 2.0% or less, Mn: 0.10% or more and 1.70% or less, P: 0.05% or less, S: 0.0050% or less, Al: 0.01% or more and 0.20% or less, N: 0.010% or less, B: 0.0002% or more and less than 0.0035%, Nb: 0.002% or more and 0.08% or less, Ti: 0.002% or more and 0.12% or less, Cu: 0.005% or more and 1% or less, Ni: 0.01% or more and 1% or less, Cr: 0.01% or more and 1.0% or less, Mo: 0.01% or more and less than 0.3%, V: 0.003% or more and 0.5% or less, Zr: 0.005% or more and 0.20% or less, W: 0.005% or more and 0.20% or less, Ca: 0.0002% or more and 0.0030% or less, Ce: 0.0002% or more and 0.0030% or less, La: 0.0002% or more and 0.0030% or less, Mg: 0.0002% or more and 0.0030% or less, Sb: 0.002% or more and 0.1% or less and Sn: 0.002% or more and 0.1% or less and a balance of Fe and inevitable impurities, a steel microstructure, in which a total area fraction of one or both of bainite containing carbides having an average grain diameter of 50 nm or less and tempered martensite containing carbides having an average grain diameter of 50 nm or less is 90% or more in a whole of the steel microstructure, and in which a total area fraction of one or both of bainite containing carbides having an average grain diameter of 50 nm or less and tempered martensite containing carbides having an average grain diameter of 50 nm or less is 80% or more in a region from the surface of the base steel sheet to a position located at 1/8 of a thickness of the base steel sheet, and diffusible hydrogen in steel in an amount of 0.20 mass ppm or less, the microstructure and the diffusible hydrogen being measured according to the description.