To provide a door lock device capable of attaching a main body device to a door simply with sufficient fixation strength, providing a striker attached to a door frame side easily at desirable position and attitude, and reducing limit on an installation place greatly.

This door lock device has a transmitter, the main body device receiving a signal from the transmitter to let a shaft for door locking advance and retract in its axial direction, and the striker provided with a lock hole in which the shaft is inserted and is engaged. A base of the main body device for attaching the main body device to the door is extended toward an outer side of the main body device. A mounting hole in which a mounting means for attaching the base to the door is inserted is provided in an extension part.