The present invention provides an optically clear adhesive sheet that has excellent flexibility and prevents delay bubbles in high temperature and high humidity environments. The optically clear adhesive sheet of the present invention sequentially includes a first surface-adhesive layer, an intermediate adhesive layer, and a second surface-adhesive layer. The first surface-adhesive layer and the second surface-adhesive layer each have a higher storage elastic modulus at 85° C. than the intermediate adhesive layer. The first surface-adhesive layer and the second surface-adhesive layer each have a storage elastic modulus at 85° C. of 3.0×104 Pa or higher and 30.0×104 Pa or lower. The intermediate adhesive layer has a storage elastic modulus at 85° C. of 1.0×104 Pa or higher and 15.0×104 Pa or lower. The intermediate adhesive layer contains polyurethane.