An automatic driving vehicle system comprising: a surrounding information recognition unit configured to recognize surrounding information of a vehicle; a vehicle state recognition unit configured to recognize a vehicle state of the vehicle; a running plan generation unit configured to generate a running plan, including a target control value that is a target for controlling the vehicle state of the vehicle, based on the surrounding information of the vehicle and configured to generate a control band of the target control value for the vehicle in the running plan, the control band being a band of target control values that are permissible in the running plan, based on at least one of the vehicle state and the surrounding information; a computation unit configured to compute a command control value such that the vehicle state becomes a target vehicle state corresponding to the target control value, based on the running plan, the vehicle state and the control band; and an actuator configured to control the running of the vehicle based on the command control value, wherein the running plan generation unit is included in a first ECU, and the computation unit is included in a second ECU that is different from the first ECU, and wherein the first ECU and the second ECU are configured to communicate with each other through a communication line, wherein when the current vehicle state is inside the control band, the first computation unit is configured to compute the command control value such that the vehicle state approaches the target vehicle state more gradually compared to when the current vehicle state is outside the control band. a surrounding information recognition unit configured to recognize surrounding information of a vehicle; a vehicle state recognition unit configured to recognize a vehicle state of the vehicle; a running plan generation unit configured to generate a running plan, including a target control value that is a target for controlling the vehicle state of the vehicle, based on the surrounding information of the vehicle and configured to generate a control band of the target control value for the vehicle in the running plan, the control band being a band of target control values that are permissible in the running plan, based on at least one of the vehicle state and the surrounding information; a computation unit configured to compute a command control value such that the vehicle state becomes a target vehicle state corresponding to the target control value, based on the running plan, the vehicle state and the control band; and an actuator configured to control the running of the vehicle based on the command control value, wherein the running plan generation unit is included in a first ECU, and the computation unit is included in a second ECU that is different from the first ECU, and wherein the first ECU and the second ECU are configured to communicate with each other through a communication line, wherein when the current vehicle state is inside the control band, the first computation unit is configured to compute the command control value such that the vehicle state approaches the target vehicle state more gradually compared to when the current vehicle state is outside the control band.