The present invention relates to a transforming growth factor-beta (TGF-²)-mimicking peptide containing a particular amino acid sequence and a composition for preventing or treating TGF-²-effective disorders or conditions using the same. The peptide of the present invention may be much higher stability than natural-occurring TGF-² and improve drawbacks caused by high molecular weight of natural-occurring TGF-². The peptide of this invention can be advantageously applied to treatment or improvement of TGF-²-effective disorders or conditions and have excellent efficacies on skin whitening and wrinkle improvement.
