A multipurpose window having various functions including ventilation, lighting, and security is provided. The multipurpose window includes: a frame; a plurality of doors configured to be arranged in a row in the frame; and a pair of link assemblies configured to be installed on both sides of each of the doors, configured to link the doors and configured to open or shut the frame by being folded or unfolded. Each of the link assemblies includes: a plurality of first link elements configured to be installed on one side of each of the doors and include an outermost first link element, and that is hinged to the frame and one or more other first link elements that are slidably supported by the frame; a second link element configured to be hinged to a center of the outermost first link element and configured to be hinged to a near end of a first link element that is adjacent to the outermost first link element; a third link element configured to be hinged to a center of another outermost link element and configured to be hinged to a near end of a first link element that is adjacent to the another outermost first link element; and a fourth link element configured to be hinged to a center of a central first link element and to near ends of a pair of first link elements adjacent to the central first link element.