Abstract: A window includes a window frame and a screen mounting assembly. The window frame is formed with two rail slots. The screen mounting assembly is adapted to be connected to a window screen and includes a roller unit, a sliding unit and an interconnecting unit. The roller unit includes a roller seat. The sliding unit is slidable along the rail slots and defines an engaging groove. The interconnecting unit is operable between a disengaging state where the interconnecting unit is connected to the roller seat, and an engaging state where the interconnecting unit is separated from the roller seat and inserted into the engaging groove so as to engage the sliding unit, such that movement of the sliding unit along the rail slots results in winding and unwinding of the window screen.