A steel for nitrocarburizing comprising: a chemical composition that contains, in mass%, C: 0.01 % or more and less than 0.20 %, Si: 1.0 % or less, Mn: 1.5 % or more and 3.0 % or less, P: 0.02 % or less, S: 0.06 % or less, Cr: 0.30 % or more and 3.0 % or less, Mo: 0.005 % or more and 0.40 % or less, V: 0.02 % or more and 0.5 % or less, Nb: 0.003 % or more and 0.20 % or less, Al: 0.010 % or more and 2.0 % or less, Ti: more than 0.005 % and less than 0.025 %, N: 0.0200 % or less, and Sb: 0.0005 % or more and 0.02 % or less, and optionally one or more selected from the group consisting of B: 0.0100 % or less, Cu: 0.3 % or less, Ni: 0.3 % or less, W: 0.3 % or less, Co: 0.3 % or less, Hf: 0.2 % or less, Zr: 0.2 % or less, Pb: 0.2 % or less, Bi: 0.2 % or less, Zn: 0.2 % or less, and Sn: 0.2 % or less, and the balance consisting of Fe and incidental impurities, with the chemical composition satisfying either one of the following relations: in a case where the C content is 0.01 % or more and 0.10 % or less, S / 32 / Ti / 48 + N / 14 / Ti / 48 ≤ 13.0, and in a case where the C content is more than 0.10 % and less than 0.20 %, 2 S / 32 / Ti / 48 + 3 N / 14 / Ti / 48 ≤ 35.0; and a steel microstructure that contains bainite phase in an area ratio of more than 50 %. a chemical composition that contains, in mass%, C: 0.01 % or more and less than 0.20 %, Si: 1.0 % or less, Mn: 1.5 % or more and 3.0 % or less, P: 0.02 % or less, S: 0.06 % or less, Cr: 0.30 % or more and 3.0 % or less, Mo: 0.005 % or more and 0.40 % or less, V: 0.02 % or more and 0.5 % or less, Nb: 0.003 % or more and 0.20 % or less, Al: 0.010 % or more and 2.0 % or less, Ti: more than 0.005 % and less than 0.025 %, N: 0.0200 % or less, and Sb: 0.0005 % or more and 0.02 % or less, C: 0.01 % or more and less than 0.20 %, Si: 1.0 % or less, Mn: 1.5 % or more and 3.0 % or less, P: 0.02 % or less, S: 0.06 % or less, Cr: 0.30 % or more and 3.0 % or less, Mo: 0.005 % or more and 0.40 % or less, V: 0.02 % or more and 0.5 % or less, Nb: 0.003 % or more and 0.20 % or less, Al: 0.010 % or more and 2.0 % or less, Ti: more than 0.005 % and less than 0.025 %, N: 0.0200 % or less, and Sb: 0.0005 % or more and 0.02 % or less, and optionally one or more selected from the group consisting of B: 0.0100 % or less, Cu: 0.3 % or less, Ni: 0.3 % or less, W: 0.3 % or less, Co: 0.3 % or less, Hf: 0.2 % or less, Zr: 0.2 % or less, Pb: 0.2 % or less, Bi: 0.2 % or less, Zn: 0.2 % or less, and Sn: 0.2 % or less, and the balance consisting of Fe and incidental impurities, with the chemical composition satisfying either one of the following relations: B: 0.0100 % or less, Cu: 0.3 % or less, Ni: 0.3 % or less, W: 0.3 % or less, Co: 0.3 % or less, Hf: 0.2 % or less, Zr: 0.2 % or less, Pb: 0.2 % or less, Bi: 0.2 % or less, Zn: 0.2 % or less, and Sn: 0.2 % or less, and the balance consisting of Fe and incidental impurities, with the chemical composition satisfying either one of the following relations: in a case where the C content is 0.01 % or more and 0.10 % or less, S / 32 / Ti / 48 + N / 14 / Ti / 48 ≤ 13.0, and in a case where the C content is more than 0.10 % and less than 0.20 %, 2 S / 32 / Ti / 48 + 3 N / 14 / Ti / 48 ≤ 35.0; and a steel microstructure that contains bainite phase in an area ratio of more than 50 %.