A muscle pain suppressant, or functional food, that can be continuously taken on a daily basis, excelling in safety, and that can relieve or prevent the onset of muscle pain, being especially effective in the suppression of delayed onset muscle soreness. As an active ingredient, there is contained a fermented milk preferably exhibiting at least one of antioxidant enzyme developing potency, heat shock protein developing potency, and neutrotaxis and tissue infiltration inhibiting potency, which fermented milk is obtained by fermenting milk by the use of microbial cells containing Lactobacillus helveticus.
