The frameless balcony adopts a high security tempered glass, and the corresponding hardware is combined with a large-section aluminum alloy structure. Its design enables each window to move both left and right, and can also be arranged 90-by-block, and the entire balcony window can be According to the user's needs, it is fully open and can also be completely closed, fully retaining the features and functions that the balcony should have. It can effectively block wind and rain, cut off dust and noise, and has a reasonable structure so that the windows can be opened inward. It is not necessary to open the window out of the body and the cleaning is very safe and simple. Because there is no vertical window frame, there is no obstruction to the line of sight when the window is closed, and the maximum light penetration is close to nature, making the balcony a fully casual sun room.