TWI820299B

The present invention provides an adhesive sheet that can exhibit superior adhesion to a base material and superior durability even under high-temperature and high-humidity conditions, and has superior workability. The present invention is specifically an adhesive sheet having an adhesive agent layer containing an adhesive agent composition in a half-cured state, wherein the adhesive agent composition contains a crosslinkable acrylic copolymer A having an acidic component, a crosslinking agent B, a polyfunctional monomer C having two or more reactive double bonds in the molecule, a monofunctional monomer D having a reactive double bond in the molecule, and a photopolymerization initiator E, the crosslinkable acrylic copolymer A has a glass transition temperature (Tg) of -40°C or higher, the adhesive agent layer is post-curable, and, when the adhesive agent layer is irradiated with actinic radiation in a cumulative light amount of 3000 mJ/cm2 for post-curing, the adhesive agent layer satisfies physical propert