A liquid discharge structure comprising: a casing having a plate-shaped bottom wall with a discharge opening for liquid, the liquid being collected inside the casing which is configured to be installed in a vehicle; a blocking wall outside the bottom wall, wherein the blocking wall is overlapped with the discharge opening in a plan view on the bottom wall and opposed to the bottom wall with a gap between the blocking wall and the bottom wall; and a pair of vertical walls configured as walls, each of which connects one of a pair of lateral sides of the blocking wall to the bottom wall, the pair of vertical walls extending towards the bottom wall from the blocking wall in a front-rear direction intended to coincide with the front-rear direction of the vehicle, the pair of vertical walls being opposed to each other in a width direction intended to coincide with the width direction of the vehicle, wherein the pair of vertical walls is configured to define a discharge path together with the bottom wall and the blocking wall, the discharge path being opened towards both of a front and rear side intended to coincide with front and rear sides of the vehicle and configured to discharge the liquid in the front-rear direction, wherein the liquid has passed through the discharge opening, wherein the discharge path is configured in form of a tapered path with an extension in the width direction, wherein the extension in the width direction is gradually reduced from the front side to the rear side, intended to coincide with front and rear sides of the vehicle, and characterized in that the blocking wall is formed in a trapezoid plate shape with a long side intended to be located facing the front side of the vehicle and a short side intended to be oriented facing the rear side of the vehicle. a casing having a plate-shaped bottom wall with a discharge opening for liquid, the liquid being collected inside the casing which is configured to be installed in a vehicle; a blocking wall outside the bottom wall, wherein the blocking wall is overlapped with the discharge opening in a plan view on the bottom wall and opposed to the bottom wall with a gap between the blocking wall and the bottom wall; and a pair of vertical walls configured as walls, each of which connects one of a pair of lateral sides of the blocking wall to the bottom wall, the pair of vertical walls extending towards the bottom wall from the blocking wall in a front-rear direction intended to coincide with the front-rear direction of the vehicle, the pair of vertical walls being opposed to each other in a width direction intended to coincide with the width direction of the vehicle, wherein the pair of vertical walls is configured to define a discharge path together with the bottom wall and the blocking wall, the discharge path being opened towards both of a front and rear side intended to coincide with front and rear sides of the vehicle and configured to discharge the liquid in the front-rear direction, wherein the liquid has passed through the discharge opening, wherein the discharge path is configured in form of a tapered path with an extension in the width direction, wherein the extension in the width direction is gradually reduced from the front side to the rear side, intended to coincide with front and rear sides of the vehicle, and characterized in that the blocking wall is formed in a trapezoid plate shape with a long side intended to be located facing the front side of the vehicle and a short side intended to be oriented facing the rear side of the vehicle.