A bearing device for a vehicle wheel comprising: an outer member which has a plurality of rows of outer raceway surfaces provided on an inner periphery; an inner member which includes a hub ring and at least one inner ring, the hub ring having a small-diameter step portion that is provided on an outer periphery and axially extends and a vehicle wheel mounting flange that is disposed on an outer side with respect to the small-diameter step portion, the at least one inner ring being press-fitted to the small-diameter step portion of the hub ring, the inner member having a plurality of rows of inner raceway surfaces that are provided on an outer periphery and face the plurality of rows of outer raceway surfaces; a plurality of rows of rolling elements that are rollably accommodated between the inner raceway surfaces of the inner member and the outer raceway surfaces of the outer member; and an outer-side seal member that closes an outer-side opening end of an annular space formed by the outer member and the inner member, the outer-side seal member including a core metal which is fitted to the outer member, a seal member which is joined to the core metal, and a metal ring which is fitted to the hub ring of the inner member and with which the seal member is in sliding contact, an annular space being provided between the metal ring and the hub ring, and the annular space being filled with a filler, characterised by further comprising a rubber member that is provided radially outside the metal ring and is in contact with a flat surface portion of the vehicle wheel mounting flange of the hub ring, wherein a radially inner end portion of the rubber member axially located between a disk portion of the metal ring and the flat surface portion is in contact with the filler. an outer member which has a plurality of rows of outer raceway surfaces provided on an inner periphery; an inner member which includes a hub ring and at least one inner ring, the hub ring having a small-diameter step portion that is provided on an outer periphery and axially extends and a vehicle wheel mounting flange that is disposed on an outer side with respect to the small-diameter step portion, the at least one inner ring being press-fitted to the small-diameter step portion of the hub ring, the inner member having a plurality of rows of inner raceway surfaces that are provided on an outer periphery and face the plurality of rows of outer raceway surfaces; a plurality of rows of rolling elements that are rollably accommodated between the inner raceway surfaces of the inner member and the outer raceway surfaces of the outer member; and an outer-side seal member that closes an outer-side opening end of an annular space formed by the outer member and the inner member, the outer-side seal member including a core metal which is fitted to the outer member, a seal member which is joined to the core metal, and a metal ring which is fitted to the hub ring of the inner member and with which the seal member is in sliding contact, an annular space being provided between the metal ring and the hub ring, and the annular space being filled with a filler, characterised by further comprising a rubber member that is provided radially outside the metal ring and is in contact with a flat surface portion of the vehicle wheel mounting flange of the hub ring, wherein a radially inner end portion of the rubber member axially located between a disk portion of the metal ring and the flat surface portion is in contact with the filler.