The invention relates to a biomarker for distinguishing depression and bipolar affective disorder and application thereof, in particular to a composition for distinguishing depression and bipolar affective disorder, a method for providing information for distinguishing depression and bipolar affective disorder through the composition and the like, and the composition comprises a preparation. The preparation detects the expression level of each of six proteins of a biomarker based on a biomarker composition for distinguishing depression from bipolar affective disorder, and the biomarker composition comprises an
eosinophilic granulocyte chemokine (
Eotaxin), a
nerve growth factor (NGF, NGF, NGF, NGF, NGF, NGF, NGF, NGF, NGF, NGF, NGF, NGF, NGF, NGF, NGF, NGF, NGF, NGF, NGF, NGF, NGF, NGF, NGF, NGF and NGF in a serum sample. The invention relates to a
tumor necrosis factor-alpha (
tumor necrosis factor-alpha, TNF-alpha), a glial
cell derived neurotrophic factor (GDNF), an
interleukin-1beta (
interleukin-1beta, IL-1beta), and a serum soluble CD40 ligand (sCD40L), in particular to a
tumor necrosis factor-alpha (tumor
necrosis factor-alpha, TNF-alpha), a glial
cell derived neurotrophic factor (GDNF), an
interleukin-1beta (interleukin-1beta, IL-1beta), a tumor
necrosis factor-alpha (tumor
necrosis factor-alpha, TNF-alpha) and a serum soluble CD40 ligand (sCD40L).