A pressure-sensitive adhesive layer 3 is formed on a release treated surface of a release liner 4, and gas from holes 40 in the release liner 4 is made to move to the outside of the pressure-sensitive adhesive layer 3, thus forming through holes 31 in the pressure-sensitive adhesive layer 3. The pressure-sensitive adhesive layer 3 and a base material 2 having provided therein gas-passing channels that communicate to the outside of the pressure-sensitive adhesive sheet are then laminated together such that the gas-passing channels in the base material 2 and the through holes 31 in the pressure-sensitive adhesive layer 3 communicate with one another, thus obtaining a pressure-sensitive adhesive sheet 1. According to the pressure-sensitive adhesive sheet 1, air entrapment and blistering can be prevented or eliminated while securing adequate adhesive strength and with no marring of the appearance.