The invention discloses a door window which comprises a vertical profile frame, a transverse profile frame, an upper fixing window body, a sash screen, a ventilating sash screen, a rotary sliding device and guiding positioning locks. The rotary sliding device enables the sash screen or the ventilating sash screen to rotate by 180 degrees and horizontally move to any position. A positioning plug pin is arranged on the rotary sliding device, and the guiding positioning locks are arranged on a left side profile frame of the sash screen and a right side profile frame of the ventilating sash screencorrespondingly. The door window has the beneficial effects that the door window can achieve natural ventilation for 24 h when the sash screen is in a closing-opening state, air exchanging is withoutworry, space mastering is flexible, connection is avoided through a single sash, positioning is conducted randomly during flat-opening, sliding, horizontally-moving and rotation by 180 degrees, and accordingly rotary cleaning for sanitation is facilitated; and working is convenient, rapid and safer, rolling and horizontal sliding are integrated into a single track, a ventilating door integrates comprehensive design of rabbets, the structure is compact, materials and spaces are saved, durability in using is achieved, and the safer effect is achieved.