Abstract: A door locking device for a vehicle includes an inside handle for releasing a door latch of the vehicle; a motion transmit member for transmitting a motion of said inside handle to the door latch; a safety knob interconnected with the inside handle for locking the door latch; and a motion delay mechanism provided between the inside handle and the motion transmit member, wherein the motion delay mechanism do not transmit the motion of the inside handle to the door latch during a first period of the motion of the inside handle and the motion delay mechanism transmit the motion of the inside handle to the door latch during the remaining period of the motion of the inside handle. By pulling the inside handle when the safety knob is in the locked state, the safety knob is unlocked first and, then, the engagement between the door latch and the door striker is released such that these two operation do not interfere with each other thus assuring a precise operation of the door latch.