The present invention relates to a WNT-derived novel peptide and use thereof. WNT-derived peptide of the present invention possesses identical or similar activities to natural-occurring WNT protein, and has much higher stability and skin penetration potency than natural-occurring WNT protein. Therefore, the composition containing the present peptide not only shows excellent effects on improvement in hair loss (for example, promotion of hair growth or production of hair), but also has superior efficacies on treatment of a WNT signal transduction pathway-related disorder. In addition, the outstanding activity and stability of the present peptide described above may be greatly advantageous in application to pharmaceutical compositions, quasi-drugs and cosmetics.