PROBLEM TO BE SOLVED: To provide an absorbent article that shows a slippage prevention effect when used by attachment to another absorbent article or underwear and also is easily detached from the other absorbent article or underwear.SOLUTION: An absorbent article includes: a top sheet a back sheet and an absorbent core arranged between both of the sheets, and has fasteners 11 on the outer surface of the back sheet. Each fastener 11 includes: a base material 12 and multiple engagement parts 13 arranged on the outer surface of the base material 12. Each engagement part 13 has a stem part 14 and a head part 15. The head part 15 includes: a lower head part 15L formed to linearly enlarge the width toward a top and an upper head part 15U formed to linearly reduce the width toward a top with the top formed flat.
