Photocuring composition for transparent bonding sheet, bonding sheet using same and use thereof

The invention provides a photocuring composition with the acid value of 0-5 mg KOH/g. The photocuring composition comprises polyurethane (A) with polyoxyalkylene polyalcohol as the skeleton, with a (methyl) acryloyl group at the tail end, and with the weight-average molecular weight being ten thousand-three hundred thousand, (methyl) acrylic ester (B) with hydroxy, other photopolymerizable monomers (C) and a photopolymerization initiator (D). An optical bonding sheet is formed through curing of the photocuring composition and a transparent conducting film lamination body can be obtained when the optical bonding sheet is pasted to a conducting layer of a transparent conducting film.