To provide a one-way clutch in which lubricant is not dispersed by centrifugal force at the time of one-way clutch racing, but exists at the time of engagement.
The one-way clutch comprises: an outer ring 11; an inner ring 12 rotatable relatively to the outer ring 11; a plurality of engaging elements 13 which are arranged circumferentially with spaces between the outer ring and inner ring, and engages both rings by engaging with outer ring inner peripheral surface and inner ring outer periphery when the outer ring and the inner ring rotate relatively; a retainer 14 holding each engaging element 13; and an elastic member which biases the each engaging element 13 in an engagement direction to the inner peripheral surface and the inner periphery, and the one-way clutch is formed by enclosing porous solid lubricant 2 between the outer ring and inner ring. The porous solid lubricant indispensably consists of lubricant component and resin component, and is solid mass porously formed by processing the resin component in foaming and curing.
SATO KOJI
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