A vehicle control system comprising a steer-by-wire system, wherein the steer-by-wire system comprises: a steering device which is configured to turn wheels of a vehicle; a reaction force device which is mechanically separated from the steering device and is configured to apply a steering reaction force to a steering wheel; and a controller which is configured to control the steering reaction force by drive control of the reaction force device in response to an operation of the steering wheel; wherein the controller is further configured to: obtain a signal including a component due to a reaction force which acts on the wheels from a road surface; extract a signal being greater than or equal to a predetermined frequency from the signal including the component due to the reaction force; and calculate a control amount of the reaction force device based on the extracted signal equal to or greater than the predetermined frequency; characterized in that: the signal equal to or greater than the predetermined frequency includes a first signal which belongs to a first frequency band and a second signal which belongs to a second frequency band corresponding to a remaining frequency band rather than the first frequency band; and the controller is further configured to: determine whether or not a predetermined condition is established; and if it is determined that the predetermined condition is established, weaken the first signal in the calculation processing of the control amount. a steering device which is configured to turn wheels of a vehicle; a reaction force device which is mechanically separated from the steering device and is configured to apply a steering reaction force to a steering wheel; and a controller which is configured to control the steering reaction force by drive control of the reaction force device in response to an operation of the steering wheel; wherein the controller is further configured to: obtain a signal including a component due to a reaction force which acts on the wheels from a road surface; extract a signal being greater than or equal to a predetermined frequency from the signal including the component due to the reaction force; and calculate a control amount of the reaction force device based on the extracted signal equal to or greater than the predetermined frequency; characterized in that: the signal equal to or greater than the predetermined frequency includes a first signal which belongs to a first frequency band and a second signal which belongs to a second frequency band corresponding to a remaining frequency band rather than the first frequency band; and the controller is further configured to: determine whether or not a predetermined condition is established; and if it is determined that the predetermined condition is established, weaken the first signal in the calculation processing of the control amount. obtain a signal including a component due to a reaction force which acts on the wheels from a road surface; extract a signal being greater than or equal to a predetermined frequency from the signal including the component due to the reaction force; and calculate a control amount of the reaction force device based on the extracted signal equal to or greater than the predetermined frequency; characterized in that: the signal equal to or greater than the predetermined frequency includes a first signal which belongs to a first frequency band and a second signal which belongs to a second frequency band corresponding to a remaining frequency band rather than the first frequency band; and the controller is further configured to: determine whether or not a predetermined condition is established; and if it is determined that the predetermined condition is established, weaken the first signal in the calculation processing of the control amount. the signal equal to or greater than the predetermined frequency includes a first signal which belongs to a first frequency band and a second signal which belongs to a second frequency band corresponding to a remaining frequency band rather than the first frequency band; and the controller is further configured to: determine whether or not a predetermined condition is established; and if it is determined that the predetermined condition is established, weaken the first signal in the calculation processing of the control amount. determine whether or not a predetermined condition is established; and if it is determined that the predetermined condition is established, weaken the first signal in the calculation processing of the control amount.