A security barrier system includes a security barrier unit including a first panel group, a second panel group, a connecting member for connecting the first panel group and the second panel group. The first and second panel groups are disposed substantially in parallel and face each other. Each of the first and second panel groups includes one or more sub-panel groups, each of which includes barrier panels arranged in line, intermediate members each disposed between adjacent barrier panels, rope tubes and ropes. Each barrier panel has a front face, a rear face and side faces and has channels passing through from one side face to another side face. The rope tubes are disposed in the channels, respectively, so that the rope tubes pass through the barrier panels and the intermediate members. The barrier panels and the intermediate members are connected by the ropes disposed in the rope tubes.