TWI718236B

Provided is an adhesive sheet which is able to be suppressed in changes of the characteristics of a bonding film X due to migration of an additive in the bonding film X to an adhesive tape in the adhesive sheet. The present invention provides an adhesive sheet in which a bonding film X, an adhesive layer Y and a base film Z are sequentially arranged in the order of X, Y and Z, and which is characterized in that: the bonding film X contains a base resin and 0.05-20% by mass of a first additive (A) that is a functional component selected from among a photopolymerization initiator, a thermal polymerization initiator, a polymerization inhibitor, an antistatic agent, a crosslinking accelerator, an anti-aging agent and a softening agent and has a molecular weight of 500 or less; the adhesive layer Y contains 100 parts by mass of a (meth)acrylate ester copolymer (B), 0.5-10 parts by mass of a polyfunctional isocyanate curing agent (C) and a second additive (D) that is the same functional component as the first addit