Provided is a protective structure for vehicle electrical components that can prevent the infiltration of water from above and more reliably protect electrical components (high-voltage electrical components). As a representative configuration of the present invention, a protective structure for vehicle electrical components for protecting an electrical component mounted on the vehicle floor panel includes a lid that covers the electrical component from above, and a front panel, rear panel, and pair of side panels that are arranged around the lid and parallel to an upper face of the lid, and the panels have gutter-shaped edges that support the periphery of the lid.