NOVELTY - A photocurable composition comprises monofunctional (meth)acrylate, polyfunctional (meth)acrylate, photoinitiator, alicyclic saturated hydrocarbon resin and filler. The monofunctional (meth)acrylate is 15C or more alicyclic or aliphatic monofunctional (meth)acrylate. The content of polyfunctional (meth)acrylate, photoinitiator, alicyclic saturated hydrocarbon resin and filler with respect to 100 parts mass of monofunctional (meth)acrylate is 0.1-10 parts mass, 0.1-10 parts mass, 50-200 parts mass and 10 parts mass or more, respectively.    USE - Photocurable composition is used as sealing material for wet organic solar cell e.g. dye-sensitized solar cell (all claimed).    ADVANTAGE - The photocurable composition has excellent adhesive force in high temperature, tolerance with respect to electrolyte solution, moisture permeability-proof property, screen printing ability, and electrolyte solution sealing property in high temperature. The sealing layer formed using the photocurable composition has excellent durability and reliability.    DETAILED DESCRIPTION - A photocurable composition comprises monofunctional (meth)acrylate, polyfunctional (meth)acrylate, photoinitiator, alicyclic saturatedhydrocarbon resin and filler. The monofunctional (meth)acrylate is 15C or more alicyclic or aliphatic monofunctional (meth)acrylate. The content of polyfunctional (meth)acrylate, photoinitiator, alicyclic saturated hydrocarbon resin and filler with respect to 100 parts mass of monofunctional (meth)acrylate is 0.1-10 parts mass, 0.1-10 parts mass, 50-200 parts mass and 10 parts mass or more, respectively. The total content of alicyclic saturated-hydrocarbon resin and filler with respect to 100 parts mass of monofunctional (meth)acrylate is 70 parts mass or more. An INDEPENDENT CLAIM is included for wet organic solar cell, which consists of a photoelectric converting layer containing organic compounds, in an electrolyte solution (5) enclosed between two substrates arranged through a sealing layer (6), where the sealing layer is a photocured material layer formed using the photocurable composition.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of dye-sensitized solar cell.    Transparent substrate (1)    Transparent conductive film (2)    Dye (3)    Metal oxide semiconductor layer (4)    Electrolyte solution (5)    Sealing layer (6)