LIQUID DISCHARGE STRUCTURE

An objective of the present invention is to improve a discharge capacity for liquid within a casing and a suppression capacity for liquid being introduced from the outside, with the casing being installed in a tilted state. A liquid discharge structure 10 includes a plate-shaped bottom wall 11 to be disposed tilted relative to a horizontal plane P11 at a casing 1 which is configured to be installed in a vehicle, a lateral wall 12 which is arranged vertically at a lower end edge 111 of the bottom wall 11, wherein the lower end edge 111 is configured to be located on a lower side of the bottom wall 11 being tilted, wherein the lateral wall has a discharge opening 121 for liquid collected within the casing 1, the discharge opening 121 being located at an end of the lateral wall 12 closer to the bottom wall 11, a tubular rib wall 13 projecting at least inwardly within the casing 1 from the lateral wall 12 so as to surround the discharge opening 121, and a partitioning rib wall 14 which is arranged vertically on an inner surface of the bottom wall 11 at a position closer to the lateral wall 12 so that the partitioning rib wall 14 extends intersecting a center axis 13a of the tubular rib wall 13.