A spouting structure includes a spout attached to the liquid container and having a mouthpiece, a cap screwed on the spout and having a top wall and a cylindrical protrusion protruding from a central part of the top wall having a bottom wall provided with an opening and defining a cylindrical bore, and a round plate axially movably fitted in the cylindrical bore of the cylindrical protrusion. The cylindrical protrusion protrudes downward from the top wall and is fitted in the mouthpiece of the spout. The round plate is provided with at least one opening in its peripheral part, has a plugging part formed in a central area of the lower surface thereof and capable of being plugged closely in the opening formed in the bottom wall of the cylindrical protrusion of the cap.