The present invention is directed to a composition for ameliorating hypoalbuminemia containing a branched-chain amino acid(s) as an active ingredient(s), wherein the composition contains leucine and/or isoleucine as the active ingredient(s) and does not contain valine. As the above branched-chain amino acid(s), leucine and isoleucine are preferably contained. The mass ratio of leucine to isoleucine described above is preferably from 0.1 to 10. As the above branched-chain amino acid(s), either leucine or isoleucine alone may be contained. The present invention is suitably used as an infusion formulation, an oral formulation or a food or drink.