To reduce the vibration of a roller bearing in a design specification about the roller bearing for a gyroscope, a main spindle of a machine tool, a motor, a flywheel for an artificial satellite, a measuring instrument, etc.

The roller bearing is composed of an inner race 1 forming a raceway face on the outer circumference, an outer race 3 forming the raceway face on the inner circumference, a plurality of rolling bodies that are incorporated between the raceway face 9 of the inner race and the raceway face 11 of the outer race and an annular cage 7 keeping the space between a plurality of rolling bodies mutually. Moreover, it has a guide face contacting to the outer or inner circumference race of the cage on the inner circumference face of the outer race or the outer circumference face of the inner race. The cage has a pocket face 13 formed so as to face each rolling body by sandwiching the rolling body from the peripheral direction of the cage and constitutes that the rolling body at right angles to the displacement direction of the cage contacts to the pocket face on the opposite side of the displacement direction to this rolling body when the cage is made eccentric to the outer or inner race and the outer circumference face or the inner circumference face of the cage is contacted to a part of a guide face and the outer and inner race are revolved around the shaft center mutually.