Orientable pouring spout intended to be fixed to a neck defining an opening of a container for liquids, comprising at least: - a generally shaped hollow body having a surface of revolution about a central axis, the hollow body defining a feed chamber open at an open end of the hollow body, the feed chamber being configured to lead to the container when the pouring spout is attached to the neck of the container, the hollow body also defining a liquid outlet channel extending between an opening in the surface of revolution and an opening leading to the feed chamber, - a liquid dispensing control device configured to allow or prevent the dispensing of liquid to be contained in the container through the liquid outlet channel, - a fixing device for fixing the pouring spout to the container, the hollow body being rotatably mounted on the fixing device so that the hollow body is free to rotate about the central axis relative to the fixing device when the fixing device fixes the pouring spout to the container; the fixing device having a general shape with a surface of revolution about an axis coincident with the central axis of the hollow body, the fixing device comprising a first section configured to fix the pouring spout to the container and a second section to which the hollow body is rotatably mounted, the second section having an inner surface comprising a circular rib included in a plane perpendicular to the central axis, characterised in that the feed chamber of the hollow body has an outer surface comprising a circular groove, the circular rib being configured to slide in the circular groove. comprising at least: - a generally shaped hollow body having a surface of revolution about a central axis, the hollow body defining a feed chamber open at an open end of the hollow body, the feed chamber being configured to lead to the container when the pouring spout is attached to the neck of the container, the hollow body also defining a liquid outlet channel extending between an opening in the surface of revolution and an opening leading to the feed chamber, - a liquid dispensing control device configured to allow or prevent the dispensing of liquid to be contained in the container through the liquid outlet channel, - a fixing device for fixing the pouring spout to the container, the hollow body being rotatably mounted on the fixing device so that the hollow body is free to rotate about the central axis relative to the fixing device when the fixing device fixes the pouring spout to the container; - a generally shaped hollow body having a surface of revolution about a central axis, the hollow body defining a feed chamber open at an open end of the hollow body, the feed chamber being configured to lead to the container when the pouring spout is attached to the neck of the container, the hollow body also defining a liquid outlet channel extending between an opening in the surface of revolution and an opening leading to the feed chamber, - a liquid dispensing control device configured to allow or prevent the dispensing of liquid to be contained in the container through the liquid outlet channel, - a fixing device for fixing the pouring spout to the container, the hollow body being rotatably mounted on the fixing device so that the hollow body is free to rotate about the central axis relative to the fixing device when the fixing device fixes the pouring spout to the container; the fixing device having a general shape with a surface of revolution about an axis coincident with the central axis of the hollow body, the fixing device comprising a first section configured to fix the pouring spout to the container and a second section to which the hollow body is rotatably mounted, the second section having an inner surface comprising a circular rib included in a plane perpendicular to the central axis, characterised in that the feed chamber of the hollow body has an outer surface comprising a circular groove, the circular rib being configured to slide in the circular groove.