A photochromic composition, which can function as an adhesive layer for bonding optical sheets made from a polycarbonate resin, may include a polyurethane-urea resin (A) obtained by reacting a polyol compound (A1), a polyisocyante compound (A2) that has two or more isocyanato groups in the molecule, and an amino-containing compound (A3) that contains two or more isocyanato-reactive groups in the molecule, with at least one of the isocyanato-reactive groups being an amino group; and a photochromic compound (B).