Ultraviolet light-curing adhesive agent composition and adhesive agent

The problem to be solved by the present invention is to provide an ultraviolet light-curing adhesive agent composition with excellent adhesive strength, heat and moisture whitening resistance, and heat and moisture yellowing resistance. The present invention provides an ultraviolet light-curing adhesive agent composition containing: a urethane (meth)acrylate (X) obtained by reacting a polyol (a) including polyethylene glycol (a1), a polyisocyanate (b), and a (meth)acrylic compound (c) having a hydroxyl group or an isocyanate group; a (meth)acrylic monomer (Y); and a photopolymerization initiator (Z). The present invention also provides an adhesive agent obtained using this composition. The adhesive agent obtained using this ultraviolet light-curing adhesive agent composition can be suitably used as an adhesive agent that is used for optical members. In particular, the adhesive agent can be suitably used for manufacturing IT related products such as touch panels, liquid crystal displays, plasma displays, organic EL, personal computers, mobile phones, and the like.