The present invention addresses the problem of providing a safe and novel fermented milk product which is useful in the prevention and treatment of various bone disorders such as osteoporosis, bone fractures, rheumatism, and arthritis when taken on a daily basis. A fermented milk product containing 0.9 to 150 mg/100 g of angiogenin and/or an angiogenin degradation product, and cystatin and/or a cystatin degradation product at a mass ratio of 0.006 to 1.7 relative to the angiogenin and/or angiogenin degradation product. It is possible to strengthen bones and to prevent and treat various bone disorders such as osteoporosis, bone fractures, rheumatism, and arthritis by taking said fermented milk product.
