To provide usage as a bearing with a rotating outer ring without hindrance by preventing damage of the outer ring due to insufficient quantity of oil.

In the shell type roller bearing, the shell type outer ring 2 is used as a rotating ring, and a plurality of grooves 4 for retaining oil is formed along a direction parallel with an axial direction or a direction acutely crossing the axial direction in an outer circumferential face of the shell type outer ring 2. In the outer circumferential face of the outer ring 2, a contact area with lubricant is enlarged by the grooves 4, and retaining quantity of the oil is increased. The outer ring 2 is manufactured by a machining process including drawing, and it is desirable that the grooves 4 for retaining oil are formed by transfer of streak like protruding parts provided on an inner circumferential face of a female die for drawing.