Door lock system

A door lock system configured to lock a rear door to a vehicle body of a vehicle in which an ingress/egress opening is opened and closed by a front door and the rear door which are double opening doors, comprising:

• a disablement mechanism configured to switch an inner handle and latch units between a connected state and an unconnected state, the inner handle being provided in the rear door, and the latch units being capable of keeping the rear door closed to the vehicle body;
• a base member in which the disablement mechanism is placed;
• and
• an operation member configured to come into contact with the front door, to work in response to the opening and closing of the front door, and thereby to switch the disablement mechanism between a connected state and an unconnected state, wherein
• the door lock system is provided in a front end portion of the rear door, and
• the operation member configured to come into direct contact with the front door is movably provided in the base member.