The present invention provides a production method for stabilizers that enables highly productive production on a compact production line, without performing annealing. This production method for stabilizers is characterized by including: a step in which a steel rod material including at least Mn, B, Fe, and 0.15-0.39 mass% of C is bent and molded into a product shape; and a step in which the steel rod material is tempered using a medium that has thermal conductivity that is at least equivalent to water or similar to water.