Abstract: A wing for a window or a door is provided with a profile frame (1), which forms a rabbet (3) receiving an insulating glass component (2) and has a perimeter surface (6) that surrounds the insulating glass component (2) on the end side thereof and a rabbet surface (12) that extends beyond the edge of the insulating glass component (2), and with an adhesive layer (7) for securing the insulating glass component (2) within the rabbet (3), said adhesive layer filling, at least in perimeter areas, a perimeter slot (8) between the end surfaces (5) of the insulating glass component (2) and the perimeter surface (6) of the rabbet (3) located opposite said end surfaces (5). To permit replacement of the insulating glass component, it is suggested that, in the region of a cover pane (11) of the insulating glass component (2) that faces the rabbet surface (12), a perimeter boundary ridge (22) for confining the adhesive layer (7) be provided at a distance from the front of the rabbet surface (12).