Apparatus suitable for cleaning vehicles comprising: - a base structure for positioning the vehicle, - a containment structure of the vehicle which is associated with the base structure, the containment structure comprising at least two side walls opposite to the side surfaces of the vehicle once the vehicle is placed on the base structure and at least one rear wall opposite to the front part of the vehicle once the vehicle has been placed on the base structure, - at least one plurality of washing nozzles arranged in the base structure and opposite to the below part of the vehicle when the vehicle has been placed on the base structure, said at least one plurality of washing nozzles being aligned below the underbody of the vehicle to be cleaned so as not to be outside the projection of the profile of the vehicle to be cleaned on the base structure, - another plurality of washing nozzles, which is supported by the side walls of the containment structure and is suitable for distributing washing liquid onto the vehicle, and - even another plurality of washing nozzles suitable for distributing washing liquid onto the front part of the vehicle, characterized by comprising movement means for moving the wash nozzles of said another plurality of washing nozzles, said movement means being suitable for moving said washing nozzles according to an oscillating movement with respect to the containment structure of the vehicle, said apparatus comprising means (51-55, 57) suitable for providing said another plurality of washing nozzles and said even another plurality of washing nozzles with wash liquid at high pressure so that said another plurality of washing nozzles and said even another plurality of washing nozzles are suitable for distributing high pressure washing liquid onto the vehicle, said apparatus comprising control means configured to activate said even another plurality of washing nozzles when said plurality of washing nozzles and said another plurality of washing nozzles are not active. - a base structure for positioning the vehicle, - a containment structure of the vehicle which is associated with the base structure, the containment structure comprising at least two side walls opposite to the side surfaces of the vehicle once the vehicle is placed on the base structure and at least one rear wall opposite to the front part of the vehicle once the vehicle has been placed on the base structure, - at least one plurality of washing nozzles arranged in the base structure and opposite to the below part of the vehicle when the vehicle has been placed on the base structure, said at least one plurality of washing nozzles being aligned below the underbody of the vehicle to be cleaned so as not to be outside the projection of the profile of the vehicle to be cleaned on the base structure, - another plurality of washing nozzles, which is supported by the side walls of the containment structure and is suitable for distributing washing liquid onto the vehicle, and - even another plurality of washing nozzles suitable for distributing washing liquid onto the front part of the vehicle, characterized by comprising movement means for moving the wash nozzles of said another plurality of washing nozzles, said movement means being suitable for moving said washing nozzles according to an oscillating movement with respect to the containment structure of the vehicle, said apparatus comprising means (51-55, 57) suitable for providing said another plurality of washing nozzles and said even another plurality of washing nozzles with wash liquid at high pressure so that said another plurality of washing nozzles and said even another plurality of washing nozzles are suitable for distributing high pressure washing liquid onto the vehicle, said apparatus comprising control means configured to activate said even another plurality of washing nozzles when said plurality of washing nozzles and said another plurality of washing nozzles are not active.