The three-dimensional sheet material and the flat sheet material are firmly bonded to each other, but have excellent breathability, flexibility, and good touch. This is a composite sheet material in which a three-dimensional sheet material (2) having a large number of convex portions (3) and a flat sheet material (4) having no convex portions are laminated and joined together. The three-dimensional sheet material (2) is joined to the flat sheet material (4) at the joint portion (5) spaced from the convex portion (3). A plurality of joint portions (5) are formed around each convex portion (3) so as to surround each convex portion (3). The joint part (5) is less than 50% of the area of the base part (7) surrounded by the convex part (3). At least a part of the joints (5) includes a through hole (8) penetrating the composite sheet material (1).立体シート材と平坦シート材とが互いに確りと接合されたものでありながら、通気性等に優れ、柔軟で肌触りが良好なものにする。多数の凸部(３)を形成した立体シート材(２)と、凸部を有しない平坦シート材(４)とを互いに積層して接合した複合シート材である。立体シート材(２)は、凸部(３)から離間した接合部(５)で平坦シート材(４)と接合してある。接合部(５)は、個々の凸部(３)を取り囲む状態に各凸部(３)の周囲に複数形成してある。接合部(５)は、凸部(３)で囲まれた基部(７)の面積の５０％未満である。少なくとも一部の接合部(５)は、複合シート材(１)を貫通する貫通孔(８)を備える。
