Provided is a disposable body fluid absorbent worn article which bends in a manner such that a specific section thereof projects to the outside. At least one of the front and rear waist regions (11 12) of a disposable body fluid absorbent worn article (10) one embodiment of which is a pull on type diaper has an elastic band section extending in the horizontal direction (X) and forming one section of the skin facing surface thereof. The center section of the elastic band section in the horizontal direction elastically contracts and consequently the elastic contraction amount in the center section is greater than the horizontal elastic contraction amount of a section facing but not joined to the center section in the thickness direction of the center section. A deformation inducing section that extends in a direction that intersects the elastic band section is formed in the body fluid absorbent core material of at least one of the waist regions making it easy for a projecting section (100a) to be formed in the worn article.
