To facilitate abrasion alleviation and torque reduction of a roller or a pin.
In a rolling bearing, the roller 30 is held so as to freely roll by a pin type retainer 40 fixing both ends of a pin 70 piercing a center of each roller 30 to a pair of annular side plates 50, 60 facing each other on both sides of a plurality of the pins 30 disposed between an inner ring 10 and an outer ring 20. In the pin 70, as a frictional resistance reducing means for reducing frictional resistance, a recess 70a is formed between an outer peripheral surface of the pin 70 and an inner diameter surface of a through-hole 30a of the roller 30 in an axial center part of the pin 70, by reducing a diameter of the axial center part of the pin 70 more than axial both ends.
Kunihiko Shiromura
Tsuyoshi Kumano