The invention relates to pressure-sensitive adhesive compositions which comprise (A) base resin, (B) the first multifunctional compound and (C) the second multifunctional compound that can react with the first multifunctional compound and realizes an interpenetrating network structure in the cured state, and relates to polarizers and liquid crystal displays comprising the same. The invention shows excellent durability under high temperature and/or high humidity condition and good properties such as machinability, removability and workability. The invention can provide the adhesive compositions efficiently suppressing light leakage generated in the liquid crystal displays. In particular, the adhesive compositions of the invention prevent light leakage even when being used in large display devices of 20 inches or more.