A rolling bearing lubricated with a grease includes an outer ring, an inner ring,
a plurality of rolling elements disposed between respective rolling raceway tracks
of the outer ring and the inner ring, and a retainer having a plurality of pockets
for locking the rolling elements to freely roll and formed of resin material. In
the rolling bearing, the radial clearance gap ratio of the pockets of the retainer
is set to 0r/Da0.09, and the axial clearance gap ratio of
the pockets is set to 0a/Da0.06 when the kinematic viscosity
of base oil at 40 C. of the grease is 10 to 40 mm2/sec, being
set to 0a/Da0.05 when the kinematic viscosity of base oil
is 10 to 90 mm2/sec, being set to 0a/Da0.025
when the kinematic viscosity of base oil is 10 to 160 mm2/sec.
