The present invention provides an injectable pharmaceutical composition containing the following components:(a) one or more kinds of peptides selected from a peptide represented by the formula (1):wherein the bond between Cys and Cys is a disulfide bond, Leu-OH shows that the C-terminal of Leu is a free carboxyl group, and other bond is a peptide bond, a peptide consisting of the amino acid sequence shown by Trp-Ala-Pro-Val-Leu-Asp-Phe-Ala-Pro-Pro-Gly-Ala-Ser-Ala-Tyr-Gly-Ser-Leu (SEQ ID NO: 1) and salts thereof,(b) trehalose or trehalose hydrate, and(c) a pH adjuster.
