Provided is a non-woven fabric that has favorable workability, superior flexibility, and high heat stability, and that is suitable as the top sheet, back sheet, or side gathering section of an absorbent article used in a sanitary item. The present invention pertains to a non-woven fabric that comprises a polyolefin fiber and that is characterized by the crystallite size of the polyolefin fiber being 15-50 nm inclusive, and the bending flexibility of the non woven fabric being 5-100 mm inclusive.