A substrate liquid processing apparatus of the present disclosure supplies a plurality of processing liquids from a processing liquid supplying unit in a switching manner to a substrate held on a substrate holding unit. An elevatable inner cup surrounds the substrate holding unit laterally and forms a first drain path that drains the first processing liquid. An outer cup surrounds the inner cup and forms a second drain path that drains the second processing liquid. A cover covers the outside of the outer cup, includes an eaves portion that extends inwardly from an upper side, and forms an exhaust path between the cover and the outer cup. The exhaust path is connected to the first drain path and the second drain path above inlets of the first drain path and the second drain path.