A cage of a thrust roller bearing is formed of an annular plate material
and has a plurality of pockets to house rollers on surface which
intersect with a bearing rotation axis. A first roller contact part
comprising a first roller stopper to prevent the roller from escaping
upward and a first roller guide surface to guide a roller rotation on its
processed surface, and a second roller contact part comprising a second
roller stopper to prevent the roller from escaping downward and a second
roller guide surface to guide the roller rotation on its processed
surface are provided on a wall surface of the pocket opposed to an outer
periphery of the roller. In addition, a non-contact part retreating from
the roller contact part is provided.