To prevent the staining of surrounding parts by excessive oozing of an oil, the clinging to a shaft due to dimensional shrinkage, and the rattling of a holding part.

This plain bearing apparatus mainly comprises a bearing bracket 3 fixed to a casing 2, a porous oilless bearing 4 aligned with and supported by the bracket 3, and a lubricating resin composite 7 arranged in contact with the outer surface 4a of the oilless bearing 4 and holded by a holding spring 5 and a holding plate 6. The composite 7 is a solid ring formed by integrally compositing a lubricating resin compsn. comprising a synthetic resin and a lubricating oil or a lubricating grease with a felt material.