Novel peptide and use thereof

Provided are a novel peptide and a novel immunostimulator or hair tonic comprising the peptide as an active ingredient. A peptide containing the amino acid sequence LHRLKRLRKRL (SEQ ID NO:1), preferably the amino acid sequence LHRLKRLRKRLK (SEQ ID NO:9), and consisting of not more than 23 amino acids; an immunostimulator comprising the peptide; an adjuvant for vaccines, said adjuvant comprising the peptide; a vaccine composition comprising the peptide; and a hair tonic comprising the peptide.