To provide a composite sheet which allows body fluids to permeate quickly and is excellent in air permeability.SOLUTION: A composite sheet includes a first fiber layer and a second fiber layer arranged below the first fiber layer. The first fiber layer has a flat-plate shape and has a high-density region and a low-density region where the fiber density is lower than that of the high-density region. The second fiber layer has a plurality of projecting parts protruding to the side of the first fiber layer, and an apex part of at least one part of the projecting parts out of the plurality of the projecting parts makes contact with the high-density region of the first fiber layer.SELECTED DRAWING: Figure 1A【課題】体液を素早く透過でき、且つ通気性に優れた複合シートを提供する。【解決手段】第1繊維層と、前記第1繊維層の下に配置された第2繊維層とを備えた複合シートであって、前記第1繊維層が平板状であり、高密度領域と、前記高密度領域より繊維密度が低い低密度領域とを有しており、前記第2繊維層が、前記第1繊維層側に突出する複数の凸部を有し、前記複数の凸部のうちの少なくとも一部の凸部の頂部が、前記第1繊維層の前記高密度領域に接している。【選択図】図1A
