The present invention provides a hepatocyte growth factor (HGF) preparation in the form of an injection or the like that is highly safe for central nerves and highly stable and can be used for intrathecal or intracerebroventricular administration or for administration into the spinal or cerebral parenchyma for the treatment of central nervous system diseases. The HGF preparation of the present invention contains an HGF protein as an active ingredient and lactose, glycine, sodium chloride, a pH buffering agent and a surfactant as additional ingredients.