NOVELTY - An acrylic pressure sensitive adhesive composition (C1) comprises: A) an acrylic polymer having a carboxyl group and B) a tetrafunctional epoxy compound, without a substantial amount of a tackifying resin, where the acrylic polymer (A) has been prepared by copolymerizing butyl acrylate (50-80 wt.%), ethyl acrylate (5-40 wt.%), and at least one carboxyl group-containing compound (7-22 wt.%) selected from acrylic acid, methacrylic acid, itaconic acid, crotonic acid, monobutyl maleate and O-carboxyethyl acrylate.    USE - As acrylic pressure sensitive adhesive composition useful in a double-coated adhesive sheet for fabricating a photovoltaic device (claimed), useful in solar cells.    ADVANTAGE - The acrylic pressure sensitive adhesive composition does not repel a molding resin and thus, a sufficient embedding effect can be obtained. In addition, the composition does not generate air bubbles during a molding step in the process for producing a solar cell module.    DETAILED DESCRIPTION - An acrylic pressure sensitive adhesive composition (C1) comprises: A) an acrylic polymer having a carboxyl group and B) a tetrafunctional epoxy compound, without a substantial amount of a tackifying resin, where the acrylic polymer (A) has been prepared by copolymerizing butyl acrylate (50-80 wt.%), ethyl acrylate (5-40 wt.%), and at least one carboxyl group-containing compound (7-22 wt.%) selected from acrylic acid, methacrylic acid, itaconic acid, crotonic acid, monobutyl maleate and O-carboxyethyl acrylate; and which has a weight-average molecular weight (Mw) of 600000-800000 and a glass transition temperature of -35 to -10 degrees C. INDEPENDENT CLAIMS are included for the following:    (1) a double-coated adhesive sheet laminated in the following order: a first pressure sensitive adhesive layer; a polyester film layer; a second pressure sensitive adhesive layer; a polyimide film layer; and a third pressure sensitive adhesive layer, where each of the first pressure sensitive adhesive layer, the second pressure sensitive adhesive layer and the third pressure sensitive adhesive layer is a layer formed from the acrylic pressure sensitive adhesive composition (C1); and    (2) a photovoltaic device comprising a substrate (11); at least a pair of photovoltaic elements having an interval between them arranged in parallel to each other on the substrate, where each of photovoltaic element is a laminate comprising a lower electrode layer which is in contact with surface of the substrate; a semiconductor layer (12) placed on lower electrode layer and a light receiving transparent electrode arranged on semiconductor layer; the double-coated adhesive sheet (13), arranged on surface of substrate in the gap formed between the pair of photovoltaic elements, under conditions that the gap is fully filled with double-coated adhesive sheet and each photovoltaic element is brought into close contact with double-coated adhesive sheet, and double-coated adhesive sheet has a thickness same as that of each photovoltaic element, where first pressure sensitive adhesive layer is adhered to the substrate, and the third pressure sensitive adhesive layer is in contact with the adjacent light receiving transparent electrode; at least one pair of collecting electrodes mounted continuously from surface of the light receiving transparent electrode to the surface of double-coated adhesive sheet; and a buss bar electrically connecting with the collecting electrodes on the surface of the double-coated adhesive sheet, and arranged so that the collecting electrodes are sandwiched between the surface of the double-coated adhesive sheet and the buss bar.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic cross-sectional view of a solar cell module which can be fabricated, using the double-coated adhesive sheet.    Solar cell module (1)    Electrically conductive substrate (11)    Semiconductor layers (12a, 12b)    Double-coated adhesive sheet (13)    Molding resin layer (21)