To provide a steering-by-wire type steering device of a vehicle capable of easily and precisely detecting abnormality of a contact breaker to selectively connect a steering handle and a steering wheel.

An ECU 45 for checking controls an electromagnetic clutch 31 in a cutting state on a step S11 in a state when an electric motor 22 for steering stops and inputs a steering angle θ and steering torque T on a step S12. It proceeds to a step S14 when torque T is less than torque To by determining whether the steering torque T is less than the target torque To or not on a step S13. Thereafter, it sets an abnormality flag MBF at "0" to express normality of abnormality on the clutch 31. In the meantime, it proceeds to a step S15 when the torque T is more than the torque To on the step S13. Thereafter, it sets the flag MBF at "1" to express abnormality. This abnormality determination is performed when the steering angle θ is less than a specified steering angle θo by processing of a step S16.

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