The invention discloses a push-pull casement window, which comprises a window frame, wherein a horizontal push-pull window sash frame is connected in the window frame, rotating shafts are arranged in left and right borders of the horizontal push-pull window sash frame, and crossed parts of upper and lower borders and left and right borders of the horizontal push-pull window sash frame are respectively provided with cavities, two ends of the rotating shafts are connected in the cavities, roll balls are also arranged in the cavities and are arranged above the rotating shafts, springs are arranged between the roll balls and the inner end surfaces of the cavities, and grooves matched with the roll balls to be used are arranged in the window frame. The push-pull casement window adopting the scheme has the advantages that the horizontal push-pull window sash frame can slide relative to the window frame and can also rotate relative to the window frame, so the horizontal push-pull window sash frame can be horizontally opened towards the outer side and can also be pushed and pulled leftwards and rightwards, the advantage of large open area of the casement window is realized, and the advantage of free window opening and closing position regulation of the push-pull window is also realized.