Disclosed are a translationally controlled tumor protein derived-protein transduction domain (TCTP-PTD) having the ability to penetrate the cell membrane, and to the use thereof. The TCTP-PTD peptide is capable of improving the ability of a target substance to penetrate the cell membrane to thereby effectively deliver the target substance into a living body, including cells, tissue and blood. Thus, the TCTP-PTD peptide may be used for research purposes in vitro, and may be used for clinical purposes, including treatment of various diseases, delivery of contrast agents, etc., and may also be used for diagnostic purposes and in cosmetic applications.
