The inventive concept provides a substrate treating apparatus. The substrate treating apparatus comprising: a treating vessel including an outer cup and an inner cup placed in an inner side of the outer cup, the inner cup and the outer cup in combination defining a recollecting route for a recollecting a liquid; a rotatable spin head placed within the treating vessel on which a cleaning jig is placed; wherein the treating vessel comprises a first protrusion protruding from an inner side surface of the outer cup to direct a cleaning liquid scattering from the cleaning jig toward a surface of the inner cup.