Wheel hub bearing assembly

A bearing assembly is provided with a synthetic-resin cover (25) for covering an opening in an axial direction of the bearing assembly (H) and being fitted in an inside surface of a vehicular-inner-side end of an outer ring member (2). The cover (25) comprises a cylindrical portion (26) fitted in the inside surface of the end of the outer ring member (2) and an annular portion (27). A vehicular-outer-side end face of the annular portion (27) is axially pressed against a vehicular-inner-side end face (2a) of the outer ring member (2). A metal annular member (33) is disposed on an inside surface of the cylindrical portion (26) and includes a projecting portion (46) which is formed by radially outwardly bending the vehicular-inner-side end of the annular member (33). The projecting portion (46) is embedded in the cylindrical portion (26) in such a manner that a vehicular-inner-side end face and a vehicular-outer-side end face of the projecting portion (46) are axially locked to the cylindrical portion (26).