A drawn cup roller bearing includes: a drawn cup outer ring that includes a cylindrical portion serving as an outer raceway surface, a first rib which is formed at one axial end portion of the cylindrical portion and is bent radially inwardly such that a step portion is formed at an intermediate portion of the first rib, and a second rib which is formed at the other axial end portion of the cylindrical portion and is radially inwardly folded back; an annular seal which is press-fitted in the step portion; and a cage which holds a plurality of rollers and is inserted into the drawn cup outer ring from the second rib to be mounted in the drawn cup outer ring in such a manner that the cage is retained against withdrawal by the step portion and the plurality of rollers is retained against withdrawal by the second rib.