The invention provides a novel adrenomedullin derivative sustainable for a long period which is capable of substantially suppressing unwanted side effects while maintaining pharmacological effects of adrenomedullin. An aspect of the invention relates to a compound represented by formula (I): [wherein A is an Fc region of an immunoglobulin, B is a peptide moiety derived from adrenomedullin or a modified form thereof with adrenomedullin activity, and L is a linking group comprising a peptide having any given amino acid sequence] or a salt thereof, or a hydrate thereof. Another aspect of the invention relates to a method for producing the compound represented by formula (I), and a medicament comprising the compound as an active ingredient. A-L-B (I)
