The purpose of the present invention is to provide a composition for relieving chronic inflammation. The present invention provides a composition for relieving chronic inflammation, comprising whey protein as an active ingredient. This composition can be fed to subjects having chronic inflammation, that is, subjects having a serum CRP concentration of 0.10 mg/dL or more. This composition can be employed as a composition that is used to prevent or relieve diseases or symptoms that can be prevented or relieved by the relief of chronic inflammation.本發明係以提供一種用來改善慢性發炎的組成物為其目的。根據本發明,可提供一種改善慢性發炎用組成物,其係包含乳清蛋白質作為有效成分而成。本發明之組成物可使慢性發炎狀態之對象,亦即血清CRP濃度為0.10mg/dL以上的對象攝取。本發明之組成物亦可作為用於可因慢性發炎的改善而預防或改善之疾病或症狀的預防或改善之組成物使用。