In the roof window (1), each sash member (31, 32) comprises a profile element (31a, 32a), an inner element (32c) and an intermediate element (31b, 32b) forming a connection between the profile element and the inner element of each sash member in an assembled condition of the sash (3). The profile elements (31a, 32a) of the sash members (31, 32) are located along respective exterior edge portions of the pane (4) in the assembled condition of the sash (3), and the profile elements (31a, 32a) of the top sash member (31) and the two side sash members (32) are formed as a set of longitudinal profiles of substantially uniform cross-section.