A brake system comprising: a first brake device (44, 70, 71, 76, 94, 100, 102, 106) including: a first actuator that is at least one actuator to be activated by supply of an electric energy from a power source device installed in a vehicle; and a first brake configured to restrict rotation of a first wheel that is at least one of a plurality of wheels of the vehicle, by utilizing an output of said first actuator; a second brake device (40, 54, 56) including: a second actuator that is at least one actuator to be activated by supply of the electric energy from the power source device; and a second brake configured to restrict rotation of a second wheel that is at least one of the plurality of wheels which is other than the first wheel, by utilizing an output of said second actuator, said brake system being characterized by comprising: a regenerative-electric-energy obtaining device configured to obtain a regenerative electric energy that is the electric energy returned to the power source device; and an actuator control device (64, 66, 110, 130, 132, 140, 142; 64, 66, 110, 200, 132, 140, 142) configured to reduce a total consumed electric energy including the electric energy consumed individually by said first actuator and the electric energy consumed individually by said second actuator, by controlling at least at least one of said first actuator and said second actuator in a manner that maintains a state in which a required braking force is satisfied by at least one of a first braking force and a second braking force that are a braking force of said first brake and a braking force of said second brake, respectively, such that the total consumed electric energy is made smaller when the regenerative electric energy obtained by said regenerative-electric-energy obtaining device is smaller than a given electric energy, than when the regenerative electric energy obtained by said regenerative-electric-energy obtaining device is not smaller than the given electric energy. a first brake device (44, 70, 71, 76, 94, 100, 102, 106) including: a first actuator that is at least one actuator to be activated by supply of an electric energy from a power source device installed in a vehicle; and a first brake configured to restrict rotation of a first wheel that is at least one of a plurality of wheels of the vehicle, by utilizing an output of said first actuator; a second brake device (40, 54, 56) including: a second actuator that is at least one actuator to be activated by supply of the electric energy from the power source device; and a second brake configured to restrict rotation of a second wheel that is at least one of the plurality of wheels which is other than the first wheel, by utilizing an output of said second actuator, said brake system being characterized by comprising: a regenerative-electric-energy obtaining device configured to obtain a regenerative electric energy that is the electric energy returned to the power source device; and an actuator control device (64, 66, 110, 130, 132, 140, 142; 64, 66, 110, 200, 132, 140, 142) configured to reduce a total consumed electric energy including the electric energy consumed individually by said first actuator and the electric energy consumed individually by said second actuator, by controlling at least at least one of said first actuator and said second actuator in a manner that maintains a state in which a required braking force is satisfied by at least one of a first braking force and a second braking force that are a braking force of said first brake and a braking force of said second brake, respectively, such that the total consumed electric energy is made smaller when the regenerative electric energy obtained by said regenerative-electric-energy obtaining device is smaller than a given electric energy, than when the regenerative electric energy obtained by said regenerative-electric-energy obtaining device is not smaller than the given electric energy. a regenerative-electric-energy obtaining device configured to obtain a regenerative electric energy that is the electric energy returned to the power source device; and an actuator control device (64, 66, 110, 130, 132, 140, 142; 64, 66, 110, 200, 132, 140, 142) configured to reduce a total consumed electric energy including the electric energy consumed individually by said first actuator and the electric energy consumed individually by said second actuator, by controlling at least at least one of said first actuator and said second actuator in a manner that maintains a state in which a required braking force is satisfied by at least one of a first braking force and a second braking force that are a braking force of said first brake and a braking force of said second brake, respectively, such that the total consumed electric energy is made smaller when the regenerative electric energy obtained by said regenerative-electric-energy obtaining device is smaller than a given electric energy, than when the regenerative electric energy obtained by said regenerative-electric-energy obtaining device is not smaller than the given electric energy.