A production method for stabilizers comprising steps of: forming a steel bar material into a product shape by bending the steel bar material consisting of, in wt%, C: more than 0.20 % to 0.39% or lower, Mn: 0.50 % to 1.70 %, B: 0.0005 % to 0.003 %, and Si: 0.05% to 0.40% as essential elements; P: 0.040% or lower and S: 0.040% or lower as inevitably included impurity elements; at least one element selected from a group consisting of Ni: 0.30% or lower, Cr: 1.20% or lower, Cu: 0.30% or lower, Mo: 0.08% or lower, V: 0.30% or lower, Ti: 0.05% or lower, Nb: 0.06% or lower, Al: 0.30% or lower, N: 0.02% or lower, Ca: 0.40% or lower, and Pb: 0.40% or lower as optional additive elements; and a remainder consisting of Fe and other inevitably included impurity elements; heating the bent steel bar material at a temperature between 850 °C and 1100 °C for austenitizing; quenching the heated bent steel bar material at a lower critical cooling rate or above in a medium of water, water solution with polymer, or salt water having a heat transfer coefficient within a range of ±10% with respect to a heat transfer coefficient value to water which is stationary or flowing on the steel bar, the quenching being performed through water quenching, polymer quenching or salt water quenching, preheating the quenched steel bar material that is not shot-peened in a range of 180 °C to 200 °C; coating the preheated steel bar material with a coating material; and post-heating the coated coating material at a temperature in a range of 180 °C to 200 °C; wherein a stabilizer is produced of the quenched steel bar material without being tempered, and wherein the stabilizer to be produced includes a metal texture of which 90% or higher is formed of a quench-induced martensite texture. forming a steel bar material into a product shape by bending the steel bar material consisting of, in wt%, C: more than 0.20 % to 0.39% or lower, Mn: 0.50 % to 1.70 %, B: 0.0005 % to 0.003 %, and Si: 0.05% to 0.40% as essential elements; P: 0.040% or lower and S: 0.040% or lower as inevitably included impurity elements; at least one element selected from a group consisting of Ni: 0.30% or lower, Cr: 1.20% or lower, Cu: 0.30% or lower, Mo: 0.08% or lower, V: 0.30% or lower, Ti: 0.05% or lower, Nb: 0.06% or lower, Al: 0.30% or lower, N: 0.02% or lower, Ca: 0.40% or lower, and Pb: 0.40% or lower as optional additive elements; and a remainder consisting of Fe and other inevitably included impurity elements; heating the bent steel bar material at a temperature between 850 °C and 1100 °C for austenitizing; quenching the heated bent steel bar material at a lower critical cooling rate or above in a medium of water, water solution with polymer, or salt water having a heat transfer coefficient within a range of ±10% with respect to a heat transfer coefficient value to water which is stationary or flowing on the steel bar, the quenching being performed through water quenching, polymer quenching or salt water quenching, preheating the quenched steel bar material that is not shot-peened in a range of 180 °C to 200 °C; coating the preheated steel bar material with a coating material; and post-heating the coated coating material at a temperature in a range of 180 °C to 200 °C; wherein a stabilizer is produced of the quenched steel bar material without being tempered, and wherein the stabilizer to be produced includes a metal texture of which 90% or higher is formed of a quench-induced martensite texture.