The present invention relates to a preventive or a therapeutic agent for hepatopathy, comprising, as an effective ingredient, a polypeptide derivative having an activity of binding to 
growth hormone secretagogue receptor and thus elevating 
intracellular calcium ion concentration, and having one 
amino acid sequence selected from the group consisting of 
amino acid sequences represented by SEQ ID NOS: 1 to 22, or an 
amino acid sequence in which one to several amino acids are deleted, substituted or added at the amino acid residues other that the first to forth amino acid residues from the amino-terminus in the said amino acid sequence, or a pharmacologically acceptable salt thereof. The preventive or the therapeutic agent for hepatopathy in accordance with the present invention is useful as a 
drug suitable for treating or preventing 
hepatic diseases such as 
hepatitis, liver 
cirrhosis and hepatic insufficiency. Further, the preventive or the therapeutic agent for hepatopathy in accordance with the present invention is also useful as an agent of promoting hepatic regeneration and 
hepatic function recovery after hepatectomy.