A vehicle brake system including an electric brake (16a-16d) having at least one electric actuator for pushing a friction pad toward a rotor and a plurality of controllers (30, 40, 41), connected to each other, that control the at least one electric actuator, the vehicle brake system comprising: an output cut-off control unit that controls cut-off of an output of at least a part of the plurality of controllers, and characterized in that: the plurality of controllers includes at least a first controller, a second controller, and a third controller, wherein each of the first controller, the second controller, and the third controller includes a braking force calculation section (302, 402, 412) that calculates a braking force of the electric brake, a self-determination section (304, 404, 414) that determines whether the controller itself is normal, and an other-determination section (305, 405, 415) that compares a braking force calculation result of the first controller, a braking force calculation result of the second controller, and a braking force calculation result of the third controller and determines whether the two controllers other than the controller itself among the first controller, the second controller, and the third controller are normal, and wherein the output cut-off control unit determines whether the first controller is normal based on a determination result by the self-determination section of the first controller, a determination result by the self-determination section of the second controller, a determination result of the first controller by the other-determination section of the second controller, a determination result by the self-determination section of the third controller, and a determination result of the first controller by the other-determination section of the third controller and, when determining that the first controller is not normal, cuts off an output of the first controller. the plurality of controllers includes at least a first controller, a second controller, and a third controller, wherein each of the first controller, the second controller, and the third controller includes a braking force calculation section (302, 402, 412) that calculates a braking force of the electric brake, a self-determination section (304, 404, 414) that determines whether the controller itself is normal, and an other-determination section (305, 405, 415) that compares a braking force calculation result of the first controller, a braking force calculation result of the second controller, and a braking force calculation result of the third controller and determines whether the two controllers other than the controller itself among the first controller, the second controller, and the third controller are normal, and wherein the output cut-off control unit determines whether the first controller is normal based on a determination result by the self-determination section of the first controller, a determination result by the self-determination section of the second controller, a determination result of the first controller by the other-determination section of the second controller, a determination result by the self-determination section of the third controller, and a determination result of the first controller by the other-determination section of the third controller and, when determining that the first controller is not normal, cuts off an output of the first controller.