To provide a turning bearing having the long service life, and without leakage of lubricant, under a condition used in a high load and low speed rocking.

This turning bearing has a fixed ring 2 having a rolling travel surface of an outer diameter surface, a turning ring 3 containing the fixed ring 2 in the substantial center, and a plurality of rolling elements 4 interposed between the fixed ring 2 and the turning ring 3. Both end surfaces of the fixed ring 2 and the turning ring 3 are sealed by a seal member 5, and a foaming solid lubricant 6 is sealed in this sealed space. This foaming solid lubricant 6 is a foaming solid lubricant formed by foaming and hardening a mixture including a lubricating component, a resin component, a hardening agent and a foaming agent.