A portable washing device to be used to wash vehicles, consisting of a water supply tank (1), a gravity-flow supply hose (2) leading to a pressurizing pump (3), the pressurizing pump, a distribution hose (4), an underbody washer mechanism (5) of booms (6), rollers (7), and spray nozzles (8) and hand-held wands with nozzles (9) for spraying the wash water and nozzles for a final rinse, a waterproof fabric mat (10) and collection and cleaning system (11) for collecting and recycling the used wash water. Tire ramps (12) protect the distribution hose from crushing and damage as the vehicle being washed passes over the hoses.