A wire rod comprising a chemical composition consisting of, in % by mass, C: from 0.60 to 1.15%, Si: from 0.01 to 1.80%, Mn: from 0.20 to 0.90%, P: 0.015% or less, S: 0.015% or less, Al: from 0.005 to 0.080%, N: from 0.0015 to 0.0060%, Cu: from 0.10 to 0.65%, Ni: from 0.05 to less than 0.65%, Cr: from 0 to 0.30%, Mo: from 0 to 0.30%, Ti: from 0 to 0.100%, Nb: from 0 to 0.100%, V: from 0 to 0.20%, Sn: from 0 to 0.30%, B: from 0 to 0.0050%, Ca: from 0 to 0.0050%, Mg: from 0 to 0.0050%, Zr: from 0 to 0.100%, REM: from 0 to 0.0200%; and a balance being Fe and impurities, wherein: the wire rod satisfies the following to : Cu / Ni > 1.00 ; 1.70 ≤ Y 1 ≤ 4.50 , Y 1 = 3 × Cr + 5 × Mn + Cu + Ni ; and Y 2 < 1.81 , Y 2 = C + Si / 10 + A ; with the contents of elements of C, Si, Mn, Cr, Cu, Ni, N, and Ti contained in the wire rod in % by mass being represented by [C], [Si], [Mn], [Cr], [Cu], [Ni], [N], and [Ti], respectively, and A satisfying A = a if a value of a = 350 × ([N] - 0.29 × [Ti]) satisfies a ≥ 0, and A = 0 if the value satisfies a < 0; a metal structure of the wire rod contains a pearlite structure having an area ratio of 90% or more in a cross section parallel to a longitudinal direction including a central axis of the wire rod; and the wire rod satisfies the following : Hv simax − Hv siave ≤ 50 with the Vickers hardness measured at a position of a depth of 50 μm from a surface of the wire rod in the cross section for each of eight samples si (i is an integer from 1 to 8) collected at arbitrary equal intervals in the longitudinal direction of the wire rod being Hv si , and an average value and maximum value of Hv si being respectively Hv siave and Hv simax ,wherein the Vickers hardness is measured as defined in the description. C: from 0.60 to 1.15%, Si: from 0.01 to 1.80%, Mn: from 0.20 to 0.90%, P: 0.015% or less, S: 0.015% or less, Al: from 0.005 to 0.080%, N: from 0.0015 to 0.0060%, Cu: from 0.10 to 0.65%, Ni: from 0.05 to less than 0.65%, Cr: from 0 to 0.30%, Mo: from 0 to 0.30%, Ti: from 0 to 0.100%, Nb: from 0 to 0.100%, V: from 0 to 0.20%, Sn: from 0 to 0.30%, B: from 0 to 0.0050%, Ca: from 0 to 0.0050%, Mg: from 0 to 0.0050%, Zr: from 0 to 0.100%, REM: from 0 to 0.0200%; and a balance being Fe and impurities, wherein: the wire rod satisfies the following to : Cu / Ni > 1.00 ; 1.70 ≤ Y 1 ≤ 4.50 , Y 1 = 3 × Cr + 5 × Mn + Cu + Ni ; and Y 2 < 1.81 , Y 2 = C + Si / 10 + A ; with the contents of elements of C, Si, Mn, Cr, Cu, Ni, N, and Ti contained in the wire rod in % by mass being represented by [C], [Si], [Mn], [Cr], [Cu], [Ni], [N], and [Ti], respectively, and A satisfying A = a if a value of a = 350 × ([N] - 0.29 × [Ti]) satisfies a ≥ 0, and A = 0 if the value satisfies a < 0; a metal structure of the wire rod contains a pearlite structure having an area ratio of 90% or more in a cross section parallel to a longitudinal direction including a central axis of the wire rod; and the wire rod satisfies the following : Hv simax − Hv siave ≤ 50 with the Vickers hardness measured at a position of a depth of 50 μm from a surface of the wire rod in the cross section for each of eight samples si (i is an integer from 1 to 8) collected at arbitrary equal intervals in the longitudinal direction of the wire rod being Hv si , and an average value and maximum value of Hv si being respectively Hv siave and Hv simax ,wherein the Vickers hardness is measured as defined in the description. <EOS>