PROBLEM TO BE SOLVED: To provide a composition and a fermented milk containing lactobacillus originated from natural materials and having high safety, also high skin improvement and/or treatment effects, and good production properties.SOLUTION: Applications of streptococcus thermophilus OLS3059 (Streptococcus thermophilus OLS3059), which are used for skin improvement and/or treatment, are provided. The composition for skin improvement and/or treatment contains streptococcus thermophilus OLS3059 (Streptococcus thermophilus OLS3059) and/or the cultured material thereof. Food and drink products contain the composition. The fermented milk for skin improvement and/or treatment is prepared by using Lactobacillus bulgaricus (Lactobacillus delbrueckii subspecies bulgaricus) and streptococcus thermophilus OLS3059 (Streptococcus thermophilus OLS3059). The fermented milk for skin improvement and/or treatment contains a collagen peptide and/or a ceramide.
