The present invention relates to a pressure-sensitive adhesive composition which contains an acryl-based copolymer having an epoxy group and silica particles having a nucleophilic substituent on the surface to have improved dispersion and heat resistance. The present invention has a purpose of providing a pressure-sensitive composition having heat resistance to be applicable to a high temperature treatment process of 250°C or more. The pressure-sensitive adhesive composition contains an acryl-based copolymer having an epoxy group and silica particles having a nucleophilic substituent on the surface.
