A high-strength member having a bent ridge portion obtained by using a steel sheet, wherein: the member has a tensile strength of 1470 MPa or more measured according to JIS Z 2241; an edge surface of the bent ridge portion has a residual stress of 800 MPa or less measured according to the method specified in the description; and a longest crack among cracks that extend from the edge surface of the bent ridge portion in a bent ridge direction has a length of 10 μm or less measured according to the method specified in the description, wherein the steel sheet comprises: an element composition containing, in mass%: C: 0.17% or more and 0.35% or less; Si: 0.001% or more and 1.2% or less; Mn: 0.9% or more and 3.2% or less; P: 0.02% or less; S: 0.001% or less; Al: 0.01% or more and 0.2% or less; N: 0.010% or less; and optionally one or more of Sb: 0.001% or more and 0.1% or less; B: 0.0002% or more and less than 0.0035%; Nb: 0.002% or more and 0.08% or less; and Ti: 0.002% or more and 0.12% or less; Cu: 0.005% or more and 1% or less; and Ni: 0.005% 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; and Sn: 0.002% or more and 0.1% or less, the balance being Fe and incidental impurities; and a microstructure including one or two of bainite containing carbide grains having an average grain size of 50 nm or less and martensite containing carbide grains having an average grain size of 50 nm or less with a total area fraction of 90% or more based on the entire microstructure of the steel sheet. the member has a tensile strength of 1470 MPa or more measured according to JIS Z 2241; an edge surface of the bent ridge portion has a residual stress of 800 MPa or less measured according to the method specified in the description; and a longest crack among cracks that extend from the edge surface of the bent ridge portion in a bent ridge direction has a length of 10 μm or less measured according to the method specified in the description, wherein the steel sheet comprises: an element composition containing, in mass%: C: 0.17% or more and 0.35% or less; Si: 0.001% or more and 1.2% or less; Mn: 0.9% or more and 3.2% or less; P: 0.02% or less; S: 0.001% or less; Al: 0.01% or more and 0.2% or less; N: 0.010% or less; and optionally one or more of Sb: 0.001% or more and 0.1% or less; B: 0.0002% or more and less than 0.0035%; Nb: 0.002% or more and 0.08% or less; and Ti: 0.002% or more and 0.12% or less; Cu: 0.005% or more and 1% or less; and Ni: 0.005% 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; and Sn: 0.002% or more and 0.1% or less, C: 0.17% or more and 0.35% or less; Si: 0.001% or more and 1.2% or less; Mn: 0.9% or more and 3.2% or less; P: 0.02% or less; S: 0.001% or less; Al: 0.01% or more and 0.2% or less; N: 0.010% or less; and optionally one or more of Sb: 0.001% or more and 0.1% or less; B: 0.0002% or more and less than 0.0035%; Nb: 0.002% or more and 0.08% or less; and Ti: 0.002% or more and 0.12% or less; Cu: 0.005% or more and 1% or less; and Ni: 0.005% 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; and Sn: 0.002% or more and 0.1% or less, the balance being Fe and incidental impurities; and a microstructure including one or two of bainite containing carbide grains having an average grain size of 50 nm or less and martensite containing carbide grains having an average grain size of 50 nm or less with a total area fraction of 90% or more based on the entire microstructure of the steel sheet.