FIELD: construction, particularly, designs of window. SUBSTANCE: improved revolution window has window frame, sash, guide member installed for rotation on hinges in middle part of sash with the help of cantilever-lever mechanism located between respective hinge and window frame made with grooves on frame side surface. Guide member is connected with sash and installed for displacement. Each end of groove is communicated with transverse groove running to frame external surface. Guide member is made in the form of bushing. Window is provided with fixing means located in frame in the form of rotating member having rotating shaft, knob and gate made for motion into locking position and back from it following the bushing for closing and opening. EFFECT: prevented excessive heating of closed rooms. 3 cl, 4 dwg
