Abstract: A pressure sensitive adhesive sheet (11) according to the present invention contains an acryl-based base polymer having a crosslinked structure, and an acryl-based oligomer having a glass transition temperature of 60° C. or higher. The pressure sensitive adhesive sheet has a storage elastic modulus G?25 of 5 to 75 kPa at 25° C. and 1 Hz, a loss tangent tan ?25 of 0.2 to 0.45 at 25° C. and 1 Hz, a loss tangent tan ?100 of 0.2 to 0.45 at 100° C. and 1 Hz, a difference between the tan 625 and the tan ?100 of ?0.09 to 0.09, and a glass transition temperature of ?15° C. or lower.

Abstract: Disclosed is a pressure sensitive adhesive-equipped polarizing plate (100) including a first pressure sensitive adhesive sheet arranged on one principal surface of a polarizing plate containing a polyvinyl alcohol-based polarizer. The polarizing plate includes a transparent protective film bonded to the second principal surface of the polarizer, and a urethane layer having a thickness of 0.1 to 10 ?m disposed in contact with the first principal surface of the polarizer. The value XD2 of the first pressure sensitive adhesive sheet disposed on the urethane layer is 1×10?7 g/24 h or more, where X is a water-vapor permeability of the pressure sensitive adhesive sheet, and D is a thickness of the pressure sensitive adhesive sheet.