The present invention is to provide an agent for improving bone strength, an agent for increasing the amount of collagen, and an orally ingestible composition and a quasi drug comprising at least one of the agents. An agent for improving bone strength and an agent for increasing the amount of skin collagen comprising a component derived from swallow’s nest as a major component.本發明提供骨強度改善劑及皮膚膠原量改善劑、以及含有其中至少任1種的口服組合物、醫藥部外品。以含有來自燕窩的成分作為主成分為特徵的骨強度改善劑及皮膚膠原量改善劑。