A hinge arrangement for a roof window having a frame with a plurality of frame members and a sash with a plurality of sash members and carrying a pane, said hinge arrangement comprising: a set of hinges, each including a frame hinge part configured to be connected to one frame side member in a mounted condition, and a sash hinge part configured to be connected to one sash side member opposite said frame member in the mounted condition, said sash hinge part being adapted to be rotated relative to the frame hinge part about a hinge axis (α) extending substantially perpendicularly to the longitudinal direction of the frame side member and the sash side member in the mounted condition, within a predefined angle interval, guiding means providing guidance for the sash hinge part relative to the frame hinge part, and motion modulating means configured to act on the hinge to affect the movement of the sash hinge part relative to the frame hinge part over at least a part of the predefined angle interval, the motion modulating means comprising a biasing device (7, 107, 507), and the frame hinge part and the sash hinge part of the hinge being connected to each other by a hinge pin such that the hinge axis (α) extends through the frame hinge part and the sash hinge part, and the guiding means being provided at a distance from the hinge pin and in connection with the motion modulating means, and the guiding means comprising a transmission device (6; 106; 506) comprising a rack connected to the frame hinge part (51, 151, 551), to cooperate with a pinion connected to, preferably integral with, the sash hinge part (52, 552) and characterised in that the rack is slidably connected to the frame hinge part (51, 151, 551) and in that the rack is connected to the biasing device (7,107,507). a set of hinges, each including a frame hinge part configured to be connected to one frame side member in a mounted condition, and a sash hinge part configured to be connected to one sash side member opposite said frame member in the mounted condition, said sash hinge part being adapted to be rotated relative to the frame hinge part about a hinge axis (α) extending substantially perpendicularly to the longitudinal direction of the frame side member and the sash side member in the mounted condition, within a predefined angle interval, guiding means providing guidance for the sash hinge part relative to the frame hinge part, and motion modulating means configured to act on the hinge to affect the movement of the sash hinge part relative to the frame hinge part over at least a part of the predefined angle interval, the motion modulating means comprising a biasing device (7, 107, 507), and the frame hinge part and the sash hinge part of the hinge being connected to each other by a hinge pin such that the hinge axis (α) extends through the frame hinge part and the sash hinge part, and the guiding means being provided at a distance from the hinge pin and in connection with the motion modulating means, and the guiding means comprising a transmission device (6; 106; 506) comprising a rack connected to the frame hinge part (51, 151, 551), to cooperate with a pinion connected to, preferably integral with, the sash hinge part (52, 552) and characterised in that the rack is slidably connected to the frame hinge part (51, 151, 551) and in that the rack is connected to the biasing device (7,107,507).