Abstract: A window for installation in a roof includes a window frame with frame pieces and mounting brackets. Each bracket includes an angular bracket member with first and second legs connected integrally with each other, and a substantially plate-shaped base member having an opening for receiving fasteners and is connected with the outer side wall of the frame piece. The angular bracket member is connected with the base member such that, in a transportation position of the window, the second leg of the angular bracket member protrudes inwards in relation to the base member, and, in an installation position, the second leg protrudes outwards. Locking mechanism locks the first leg relative to the base member in the installation position, and adjusting mechanism adjusts the position of the angular bracket member in at least a transverse direction perpendicular to the longitudinal direction of the frame piece of the window frame.