An adhesive composition that enables adhesion between metals, between a metal and an organic material, and between an organic material and an organic material, have at the same time an excellent storage stability, and are capable of maintaining an excellent adhesive strength even in a high temperature hydrothermal environment, is provided. The adhesive composition according to the present invention comprises an epoxy resin, an epoxy modified silicone resin, an acrylic resin, and a curing agent, the above-mentioned epoxy resin comprising a bisphenol bifunctional epoxy resin and an epoxy resin with trifunctionality or higher functionality, and the above acrylic resin comprising a binary copolymer of methyl methacrylate-butyl acrylate-methyl methacrylate or a modified product thereof.