To provide a sealing agent composition having excellent durability against electrolyte used for a dye-sensitized solar battery, excellent in adhering properties to a transparent substrate, having reliable sealing properties.

The photocuring sealing agent for dye-sensitized solar battery contains compounds expressed in (A) to (D) . (A) denotes 100 pts. wt. of (meta)acrylate containing 10-20C straight chain aliphatic hydrocarbon in a molecule, (B) denotes 5 to 15 pts. wt. of alicyclic (meta)acrylate, (C) denotes 10 pts. wt. or more of styrene group thermoplastic elastomer shown by formula stated elsewhere and (D) denotes a photopolymerization initiator, wherein, the sum of X1 and X2 denote an integer of 20 to 30, the sum of Y1 and Y2 denote an integer of 65 to 74, and Z is an integer of 1 to 5.