Movable side window of cab

The utility model relates to a movable side window of a cab. The movable side window comprises a fixed sash and a movable window, wherein the side wall of an inner ring of the fixed sash is provided with a slideway; the movable window is provided with slidable glass capable of sliding on the slideway; the slidable glass is provided with a locking mechanism; the locking mechanism is provided with a telescopic locking shaft; the side wall of the inner ring of the fixed sash is provided with at least two locking grooves, which can allow the locking shaft of the locking mechanism to be inserted in, at intervals from bottom to top. According to the movable side window disclosed by the utility model, when the movable window needs to be opened, the locking shaft of the locking mechanism withdraws to be separated from the locking groove of the fixed sash, the movable window is pushed upwards to drive the locking shaft to extend out and to be clamped into the other locking groove, and thus the opening and locking of t