The purpose of the invention is to provide an adhesive composition that makes it possible to obtain an adhesive tape having excellent repulsion resistance as well as excellent handleability, and an adhesive tape obtained using the adhesive composition. The invention is an adhesive composition containing a polymer component containing an acrylic polymer having crosslinkable functional groups, a tackifying resin in which the hydroxyl value of the alcoholic hydroxyl groups is 70 mg KOH/g or higher, and a crosslinking agent.