To solve such the problem that in a liquid permeable top sheet of two-sheet constitution made by joining a bottom of a recess formed in an upper film to a lower film, and defining a bubble chamber therebetween, passing of liquid from the junction part in the bottom of the recess of the upper film is inhibited.SOLUTION: A top sheet 14 comprises a liquid permeable sheet-like upper film 21 in which a large number of recesses 21d aligned at a prescribed interval are formed, and a liquid permeable sheet-like lower film 22 overlapped on the upper film, and joined to the bottom of the recess of the upper film. In the top sheet, each of the recesses includes: a groove-like first recess 21dextending in a first direction along the longitudinal direction of the upper film； a groove-like second recess 21dextending in a second direction different from the first direction along the longitudinal direction of the upper film 21； and a crossing area 21din which the first and second recesses are overlapped on each other. Openings 23 are formed respectively, while being brought into contact with the crossing area.SELECTED DRAWING: Figure 6【課題】アッパーフィルムに形成された凹部の底をロアーフィルムに接合し、これらの間に気泡チャンバーを画成した２枚構成の液透過性トップシートは、アッパーフィルムの凹部の底の接合部分からの液状物の通過が阻害される。【解決手段】所定間隔で配列する多数の凹部２１ｄが形成された液透過性のシート状をなすアッパーフィルム２１と、このアッパーフィルムに重ね合わされて当該アッパーフィルムの凹部の底面に接合される液透過性のシート状をなすロアーフィルム２２とを具えた本発明によるトップシート１４は、個々の凹部がアッパーフィルムの長手方向に沿って第１の方向に延在する溝状の第１の凹部２１ｄ１と、アッパーフィルム２１の長手方向に沿って第１の方向とは異なる第２の方向に延在する溝状の第２の凹部２１ｄ２と、これら第１および第２の凹部が重なり合う交差領域２１ｄＣとを有し、この交差領域に接して開口部２３がそれぞれ形成されている。【選択図】図６
