To provide a rolling bearing device which prevents fuel consumption from being worsened, by reducing a friction torque by simplifying a structure of a sealing device used for a device adjusting a tire pressure.

The rolling bearing device 1 is used for a vehicle tire pressure adjusting device provided with a compressed fluid supply source 9 for a tire air chamber 5b, and is provided with: an inner ring 2b; an outer ring 2a; and rollers 2c. The device is also provided with: a sealing member 11 mounted between a protruded end surface of an annular protruded wall 2a2 which is protruded to the inner ring 2b side and is integrally formed from all the circumference of inner circumference of the outer ring 2a in an annular space chamber 2f between the inner and outer rings 2b and 2a, and the outer circumferential surface of the inner ring 2b; a protruded wall distribution hole 2a3 inside the protruded wall 2a2 formed to communicate with an outer ring distribution hole 2a1 formed inside the outer ring 2a as a part of a compressed fluid flow passage; and an inner ring distribution hole 2b1 formed inside the inner ring 2b. A connection space S is formed by sealing a gap between the pair of sealing members 11, and the protruded wall distribution hole 2a3 and the inner ring distribution hole 2b1 are communicated with each other.