PHOTOCURING ADHESIVE SHEET

To provide an adhesive sheet having excellent storage stability while maintaining step-wise absorptivity.SOLUTION: A photocuring adhesive sheet that is a photocuring adhesive sheet containing a (meth)acrylic acid ester (co)polymer (a) as a primary component resin, in which a gel fraction of the adhesive sheet is not larger than 10 percent, a weight average molecular weight (Mw) of the adhesive sheet measured according to a gel permeation chromatography is not smaller than 200,000 and not larger than 500,000, its molecular weight distribution (Mw/Mn) is not smaller than 4 and not larger than 5, and in a molecular weight distribution curve in terms of polystyrene a maximum peak is present in a region of a molecular weight of not smaller than 50,000 and less than 400,000, and one or more peaks or shoulders are present in the region of molecular weight of not smaller than 40,000 and less than 2000,000.SELECTED DRAWING: Figure...