WHEEL BEARING DEVICE WITH ATTACHED SENSOR

A sensor-equipped wheel support bearing assembly capable of estimating an accurate load value without depending on the frequency of fluctuation that occurs in an input load, is provided. A vehicle-wheel bearing (100) is provided with a plurality of sensors (20) for detecting a load applied thereto. The vehicle-wheel bearing (100) is provided with a signal processor (31) for generating signal vectors from output signals of the sensors, a load calculation processor (32) for calculating a load acting on a wheel, based on the signal vectors, and an input load fluctuation detector (33) for detecting a fluctuation component of the input load which is included in the output signals of the sensors (20). The load calculation processor (32) calculates the load by applying a load calculation scheme that shifts in accordance with the fluctuation component detected by the input load fluctuation detector (33).