A semicircular tube-shaped bearing has a bearing main body formed from a resin, an inner circumferential surface that slides over an opposing shaft, and an outer circumferential surface contacting a housing. The semicircular tube-shaped bearing may have a laminated structure including a resin layer and includes at least a portion of the inner circumferential surface, and a reinforcing layer that is in close contact with the resin layer. In this case, the bearing main body has a resin layer that includes the inner circumferential surface, and a reinforcing layer that is in close contact with the resin layer. The reinforcing layer has a higher rigidity than the resin layer, and raises the rigidity of the resin layer by being in close contact with the resin layer. The material forming the reinforcing layer is a metal such as iron, aluminum, or stainless steel.