The present invention relates to a pharmaceutical composition for preventing and treating hearing loss. More particularly, the present invention relates to a composition including a telomerase-derived peptide, the composition being effective in the treatment and prevention of hearing loss due to an ototoxic drug. A peptide having a sequence of SEQ ID NO: 1, a peptide having 80% or more sequence homology to the sequence, or a fragment thereof, according to the present invention, has an excellent effect in the treatment and prevention of hearing loss due to an ototoxic drug.
