To provide an adsorbent film suitable for the buffer material mounted on the adsorbent plate of a mold or the like when a plate-shaped object to be adsorbed easy to deform like a ceramic green sheet is adsorbed.

The adsorbent film is constituted by coating a mold release film 1 with a heated hot melt adhesive, bonding a porous sheet 3 to the adhesive in a state that the adhesive becomes a low temperature to form a laminate wherein the mold release film 1, the pressure-sensitive adhesive layer 2 comprising the hot melt adhesive and the porous sheet 3 are laminated in this order and peeling the mold release film 1 from the laminate to laminate the pressure-sensitive adhesive layer 2 and the porous sheet 3. The porous sheet is composed, for example, of an ultra-high-molecular-weight polyethylene resin porous sheet. For example, the adhesive strength against stainless steel of the pressure-sensitive adhesive layer is 0.8 N/25 mm or above and the air permeability of the pressure-sensitive adhesive layer is 5 cm3/cm2 sec or above.