An electric storage device comprising: an electrode assembly; a case that houses the electrode assembly, the case including a defining wall; a rivet that passes through the defining wall, the rivet having a body and an insertion part formed continuously with the body; a conductive member (8, 15) that is electrically connected to the rivet; and a sealing member (10, 11) arranged between a surface of the defining wall which faces the conductive member (8, 15) and a surface of the conductive member (8, 15) which faces the defining wall and between a surface of the defining wall which faces the body and a surface of the body which faces the defining wall, wherein the sealing member (10, 11) is arranged at the defining wall, wherein the insertion part has a portion that is inserted through the defining wall, the sealing member (10, 11) and the conductive member (8, 15); the insertion part has a diameter smaller than that of the body at least in the portion inserted through the defining wall, the sealing member (10, 11) and the conductive member (8, 15); the insertion part has a hollow shaft-shaped end with a non-through hole extending in an axial direction of the insertion part, the end being crimped in a state where the insertion part has been inserted through the defining wall, the sealing member (10, 11) and the conductive member (8, 15); and wherein said electric storage device is characterised in that bottom of the non-through hole is located between the surface of the defining wall which faces the conductive member (8, 15), and the surface of the conductive member (8, 15) which faces the defining wall. an electrode assembly; a case that houses the electrode assembly, the case including a defining wall; a rivet that passes through the defining wall, the rivet having a body and an insertion part formed continuously with the body; a conductive member (8, 15) that is electrically connected to the rivet; and a sealing member (10, 11) arranged between a surface of the defining wall which faces the conductive member (8, 15) and a surface of the conductive member (8, 15) which faces the defining wall and between a surface of the defining wall which faces the body and a surface of the body which faces the defining wall, wherein the sealing member (10, 11) is arranged at the defining wall, wherein the insertion part has a portion that is inserted through the defining wall, the sealing member (10, 11) and the conductive member (8, 15); the insertion part has a diameter smaller than that of the body at least in the portion inserted through the defining wall, the sealing member (10, 11) and the conductive member (8, 15); the insertion part has a hollow shaft-shaped end with a non-through hole extending in an axial direction of the insertion part, the end being crimped in a state where the insertion part has been inserted through the defining wall, the sealing member (10, 11) and the conductive member (8, 15); and wherein said electric storage device is characterised in that bottom of the non-through hole is located between the surface of the defining wall which faces the conductive member (8, 15), and the surface of the conductive member (8, 15) which faces the defining wall.