Abstract: A door lock which includes a first bolt mounted movably in a housing and biased to a latching position, and an elongated second bolt member lying in a vertical plane and mounted movably below the first bolt. A first actuating plate is provided adjacent the first notched face and turnable about a horizontal axis to push the notched face so that the second bolt is moved to a latching position or an unlatching position. A first locking plate is cooperatively associated with the second bolt and biased to move upward to a position in which the first locking plate locks the second bolt against movement. Improvements are provided such that the second bolt member further has a second notched face in the upper end near the rear end of the second bolt member, and a second actuating plate is provided adjacent to the second notched face to push the second notched face so as to move the second bolt member.