Disposable body fluid absorbent wearing article

A disposable body fluid absorbent wearing article having a front waist region, a rear waist region and a crotch region, said article comprising:

• a body fluid absorbent pad including a liquid-absorbent core;
• a casing covering at least a body facing side of said absorbent core and extending outwardly from a circumferential edge of said core;
• means for holding said body fluid absorbent pad on a wearer's body;
• said pad being provided, at transversely opposite sides thereof and in said crotch region, with a pair of darts formed by folded parts of said casing, wherein said darts are opposed to each other and describe circular arcs which are convex toward a center line bisecting a width of said pad;
• said core including a central core section lying between said darts and lateral core sections lying outside the respective darts, wherein said central and lateral core sections are contiguous to each other in at least one of regions beyond which are located beyond and forward and rearward, respectively, of said darts in a longitudinal direction of said pad;
• and
• the circumferential edge of said core being surrounded by end flaps and side flaps both being contiguous to a sheet of said casing and extending outward beyond the circumferential edge of said core;
• wherein
• said side flaps extending outward beyond transversely opposite side edges of said core are folded back toward a body facing surface of said pad and longitudinally opposite end regions of said side flaps are bonded to said body facing surface so that pockets opening inwardly of said pad are formed between respective said side flaps and respective said lateral core sections;
• and
• said side flaps being folded back toward the body facing surface of said pad respectively have inner side edge regions which are provided, in parallel to said center line, with elastic members secured under tension to said inner side edge regions.