To provide a louver window excellent in anti-theft and fireproof function, low in cost and excellent in appearance by fitting a glazed sliding door having a frame provided no connecting means on its periphery to a supporting piece having the function of an exterior lattice.

A glass-fitted louver window comprises glazed sliding doors 31, 31 provided with a narrow frame 51 made of the metal whose melting point is equivalent to or higher than that of aluminum and which is provided with no connecting means on the periphery of a plate glass 41 or a colored glass 43. Supporting pieces 11, 11 pivotably attached to the window frame have both the function as the supporting piece and the function as an exterior lattice. A body part may be integrated with a part having the function as a lattice, or these parts may be separately formed and connected to each other. The glazed sliding door 31 is fitted to the supporting piece 11. The anti-theft function and the fireproof function are thus guaranteed, the appearance can be improved, and the cost can be reduced.