An adhesive composition for optical films, which inhibits contamination in the re-release process and peeling under severe conditions while favorably maintaining its durability and light leakage prevention properties. The adhesive composition includes: (A) an acrylic-based polymer which is obtained by copolymerizing at least the following monomer components: (a1) a (meth)acrylic acid alkyl ester and/or a (meth)acrylic acid alkoxyalkyl ester, (a2) an aromatic ring-containing monomer, (a3) a hydroxyl group-containing monomer, and optionally, (a4) a carboxyl group- or amino group-containing monomer, and which has a weight-average molecular weight of 800,000 to 1,600,000 and a value (Mw/Mn), as obtained by dividing the weight-average molecular weight of the copolymer by the number-average molecular weight thereof, of 10 to 50, (B) an isocyanate-based crosslinking agent, (C) a silane coupling agent, and optionally, (D) a crosslinking accelerator.