A laminate-packaged electric storage device comprising: an outer package, an electric storage device element, and an electrolyte solution, the outer package being formed by stacking and seal-tight bonding outer package films (21A, 21B) along a bonding section that is formed in an outer edge area of each of the outer package films (21A, 21B), and the electric storage device element and the electrolyte solution being held in a receiving section that is formed inside the outer package, a non-bonding section that is surrounded by the bonding section and communicates with the receiving section being formed in the outer edge area of each of the outer package films (21A, 21B), and an opening that is formed through at least one of the outer package films (21A, 21B), and a seal section that is formed to surround the opening being formed in an area of the non-bonding section, the outer package films (21A, 21B) being bonded in the seal section, characterized in that the opening being formed in the area of the non-bonding section at a position other than a center position, in planar view of one of the package films (21A, 21B) the seal section provided between the opening and the non-bonding section is separated from the receiving section, the non-bonding section has an approximately rectangular planar shape, and has one side that communicates with the receiving section, and the seal section is integrally formed with the bonding section so that part of the seal section protrudes into the non-bonding section from the bonding section on another side of the non-bonding section that is perpendicular to the one side that communicates with the receiving section, and the seal section is separated from the one side that communicates with the receiving section and still another one side of the non-bonding section that is opposite to the one side that communicates with the receiving section. an outer package, an electric storage device element, and an electrolyte solution, the outer package being formed by stacking and seal-tight bonding outer package films (21A, 21B) along a bonding section that is formed in an outer edge area of each of the outer package films (21A, 21B), and the electric storage device element and the electrolyte solution being held in a receiving section that is formed inside the outer package, a non-bonding section that is surrounded by the bonding section and communicates with the receiving section being formed in the outer edge area of each of the outer package films (21A, 21B), and an opening that is formed through at least one of the outer package films (21A, 21B), and a seal section that is formed to surround the opening being formed in an area of the non-bonding section, the outer package films (21A, 21B) being bonded in the seal section, the non-bonding section has an approximately rectangular planar shape, and has one side that communicates with the receiving section, and the seal section is integrally formed with the bonding section so that part of the seal section protrudes into the non-bonding section from the bonding section on another side of the non-bonding section that is perpendicular to the one side that communicates with the receiving section, and the seal section is separated from the one side that communicates with the receiving section and still another one side of the non-bonding section that is opposite to the one side that communicates with the receiving section.