A rider characteristic determining apparatus capable of determining characteristics of a rider controlling a saddle riding type vehicle, and a saddle riding type vehicle including the same, are configured such that the rider's characteristics are determined from a turning movement of the saddle riding type vehicle which reflects results of the rider controlling the saddle riding type vehicle. This enables a stable characteristic determination regardless of individual operation or control by the rider. Further, a turning performance score of the vehicle is calculated based on at least one of vehicle state amounts of a roll direction, a pitch direction and a caster angle which influence the steering angle of the saddle riding type vehicle. This enables a proper evaluation of the turning characteristic of the saddle riding type vehicle.