This invention provides a composition for increasing a body height of a patient with short stature or an individual other than patients with short stature. More specifically, the invention provides: a composition for increasing the body height of an individual comprising a guanyl cyclase B (GC-B) activator as an active ingredient, the composition being to be administered to an individual free from FGFR3 abnormality； a method for increasing the body height of an individual free from FGFR3 abnormality which comprises activating GC-B； a method for screening an agent for increasing the body height of an individual which comprises selecting an agent for increasing the body height using GC-B activity as an indication； and a method for extending a cartilage bone free from FGFR3 abnormality which comprises activating GC-B in an individual.
