Disclosed is a battery tray for holding and supporting a battery in a vehicle. The battery tray includes a reinforcement clamp and a fixing part. The reinforcement clamp is disposed on an outer surface and vertically extends from an undersurface of the tray to an upper surface of the tray along a side wall of the tray. Fixing parts are disposed on the upper surface and the undersurface of the tray to fix both upper and lower end portions of the reinforcement clamp.