Apparatus for cleaning a sensor

An apparatus for cleaning a sensor includes: a sensor that is positioned in a vehicle; a sensor bearing unit that is positioned on a vehicle body adjacent to the sensor, and at least one nozzle assembly that is positioned in the sensor bearing unit. The at least one nozzle assembly stands up by a hydraulic pressure of inflowing washer fluid. The apparatus also includes: a washer fluid passage that is in fluid connection with the nozzle assembly and through which washer fluid flows; and a motor unit that is configured to apply a driving force so that the sensor bearing unit rotates based on the sensor.