In a wheel bearing device (1): a ratio of an axial direction length C of a recessed portion (3h) formed in a through-hole (3e) of a hub ring (3) to a pitch circle diameter A of the recessed portion formed in an inner circumferential surface of the hub ring is 0.7(C/A)1.07; a ratio of an axial direction distance E between a flange surface (3j) of a wheel attachment flange (3b) and an inner end surface (4b) of an inner race (4) to an inter-ball pitch F between an inner ball row (5) and an outer ball row (6) is 2.85(E/F); and a ratio of the axial direction distance E to a pitch circle diameter D of balls (8) is 0.8(E/D) 0.94. The wheel bearing device makes it possible to suppress an increase in weight while suppressing generation of abnormal sounds.