<p>It is intended to provide a novel remedy for improving the brain function or preventing the same from worsening and a novel administration method for the remedy. Namely, a composition for preventing the brain function from worsening or improving the brain function which contains a cell growth factor. It is preferred that this cell growth factor is one selected from the group consisting of vascular endothelial growth factors (VEGFs), fibroblast growth factors (FGFs) and hepatocyte growth factors (HGFs). A method for preventing the brain function from worsening or improving the brain function which comprises the step of administering a cell growth factor to a patient.</p>
