PROBLEM TO BE SOLVED: To provide a novel neurite elongation agent that can serve as an alternative to conventional well-known neurite elongation agents, and to provide use thereof.SOLUTION: This invention relates to: a neurite elongation agent that comprises at least one of compounds represented by chemical formulas 1-4 described in the specifications as an active ingredient; and a neurological disorder preventive and/or therapeutic agent and foods and drinks including the neurite elongation agent.