A steering system comprising: a first operation device including a first displacement mechanism configured to change a position of an operation member to be operated by a driver, a first electric drive source configured to operate the first displacement mechanism, and a first detector configured to detect first positional information indicating the position of the operation member based on the first displacement mechanism ; a second operation device including a second displacement mechanism different from the first displacement mechanism and configured to change the position of the operation member in a direction different from that of the first displacement mechanism , a second electric drive source configured to operate the second displacement mechanism , and a second detector configured to detect second positional information indicating the position of the operation member based on the second displacement mechanism ; characterized by the steering system comprising: a determiner configured to determine that the first operation device and the second operation device do not malfunction when the determiner determines that the first operation device has an abnormality based on first operation information related to operation of the first operation device , and that the second operation device has an abnormality based on second operation information related to operation of the second operation device . a first operation device including a first displacement mechanism configured to change a position of an operation member to be operated by a driver, a first electric drive source configured to operate the first displacement mechanism, and a first detector configured to detect first positional information indicating the position of the operation member based on the first displacement mechanism ; a first displacement mechanism configured to change a position of an operation member to be operated by a driver, a first electric drive source configured to operate the first displacement mechanism, and a first detector configured to detect first positional information indicating the position of the operation member based on the first displacement mechanism ; a second operation device including a second displacement mechanism different from the first displacement mechanism and configured to change the position of the operation member in a direction different from that of the first displacement mechanism , a second electric drive source configured to operate the second displacement mechanism , and a second detector configured to detect second positional information indicating the position of the operation member based on the second displacement mechanism ; characterized by the steering system comprising: a second displacement mechanism different from the first displacement mechanism and configured to change the position of the operation member in a direction different from that of the first displacement mechanism , a second electric drive source configured to operate the second displacement mechanism , and a second detector configured to detect second positional information indicating the position of the operation member based on the second displacement mechanism ; characterized by the steering system comprising: a determiner configured to determine that the first operation device and the second operation device do not malfunction when the determiner determines that the first operation device has an abnormality based on first operation information related to operation of the first operation device , and that the second operation device has an abnormality based on second operation information related to operation of the second operation device . <EOS>