It is intended to provide a composite sheet which is excellent in comfort to theskin face when used in an absorbent article such as a disposable diaper. A compositesheet (1) fabricated by bonding a stretchable nonwoven fabric (2) to a non-stretchablesheet (3) using an adhesive (4). The stretchable nonwoven fabric (2) is bondedin the stretched state to the non-stretchable sheet. The composite sheet (1)has a contact area ratio of 65% or more and an air permeation resistance of 0.20KPa s/m or less. By satisfying these numerical requirements, the composite sheetshows excellent sweat absorption properties and air permeability when usedas a constituting member of an absorbent article such as a disposable diaper.