Abstract: The electronic door lock for an electronic key provided with an electronic store for a key word datum has a latch bolt (5) actuatable at least from the inside of the door by means of a handle and a bolt (7) which is lockable and unlockable by an electric drive device (35). A control circuit (81) formed especially as micro-processor reads the key word datum stored in the key, through the reading device (77), and controls the electric drive (35) in dependence thereon. The reading device (77) includes sensor elements (93, 95), especially pieco-electric elements by way of which the drive direction of the electric drive (35) is selectable by a key movement of short stroke. In order that the electronic lock may be opened manually in case of emergency, a mechanical lock cylinder (113) is provided by means of which the bolt (7) is uncoupled from the drive connection to the electric drive (35) and is bringable into a drive connection to the handle nut (23) actuating the latch bolt (5 ).