Disclosed is a therapeutic agent for rhinitis, which has a significant rhinitis-ameliorating effect on rhinitis, particularly allergic rhinitis, can exert a medicinal efficacy thereof rapidly, has fast-acting properties, can exert the medicinal efficacy thereof for a prolonged period, has no topical adverse side effect, and has excellent effectiveness and safety.Specifically disclosed is a therapeutic agent for rhinitis, particularly a therapeutic agent for allergic rhinitis, which comprises a C-type natriuretic peptide (CNP) or a B-type natriuretic peptide (BNP) as an active ingredient.