<p>An ultraviolet cross-linkable pressure sensitive adhesive sheet includes a (meth) acrylic copolymer of a monomer containing a (meth)acrylic acid ester having an ultraviolet cross-linkable site. The storage modulus of the pressure sensitive adhesive sheet before ultraviolet cross-linking is from 5.0 x 104 to 1.0 x 106 Pa at 30°C and 1 Hz and 5.0 x 104 Pa or less at 80°C and 1 Hz. The storage modulus of the pressure sensitive adhesive sheet after ultraviolet cross-linking is 1.0 x103 Pa or more at 130°C and 1 Hz.</p>
