Provided are: an agent for promoting growth hormone-secretion, containing a milk-derived basic protein fraction as an active ingredient, with the promotion of growth hormone-secretion being mediated by the promotion of secretion of ghrelin having an effect for promoting growth hormone-secretion and a method of promoting the secretion of ghrelin by using a milk-derived basic protein fraction. The agent for promoting growth hormone-secretion may be ingested on a daily basis and is highly safe even with its ingestion for a long period.
