Double sash casement window

The utility model discloses a double sash casement window, which comprises a window frame, window sashes, double-hinge rotation devices and clamp devices. The window sashes are connected with the window frame through the double-hinge rotation devices, thus the window sashes are enabled to be provided with two rotation free degrees to rotate at 360 degrees. When the double sash casement window is not needed to be opened inward a room, the clamp devices are used for compressing the middle plane of hinges, by decreasing one free degree of the window sashes, the swaying when the window sashes are opened and closed is prevented, and stability is improved; and after the clamp devices are dismantled, the window sashes can be rotated into the position close to the wall in the room, and the double sash casement window is very convenient to operate. By the adoption of the double sash casement window, the defects of not large opening degree, insufficient ventilation and lighting, and inconvenience in cleaning of the tra