Abstract: A cementing plug container for enclosing and injecting cementing plugs into the casing of an oil or gas well to reduce contamination on the interface between the well fluid and the cement, which container includes a shaped housing containing one or more plugs, a plug release mechanism for each plug, which release mechanism is characterized by an air cylinder and a cooperating plug support and release assembly which function to drop the plug or plugs from an upper interior segment of the housing into a lower interior segment or bore responsive to operation of the cylinder.