The present invention has for its object to provide a method which comprises using edible and safe food components as active ingredients and promotes the OPG production promoting effect, RANKL expression inhibiting effect and osteoclast differentiation inhibiting effect, which take part in the prevention of bone resorption, and a composition like that. The present invention provides a method for promoting the bone resorption inhibitory effect such as the OPG production promoting effect, RANKL expression inhibiting effect and osteoclast differentiation inhibiting effect by using a composition containing extracts from plants belonging to the genus Platycodon, plants belonging to the genus Origanum, plants belonging to the genus Thymus, plants belonging to the genus Zanthoxylum, plants belonging to the genus Arctium, plants belonging to the genus Camellia, plants belonging to the genus Persea, plants belonging to the genus Stevia, plants belonging to the genus Pimpinella, plants belonging to the genus Matricaria, plants belonging to the genus Malva, plants belonging to the genus Ilex, and/or plants belonging to the genus Ptychopetalum, and a composition like that.