A metalized film capacitor comprising: a capacitor element including a winding core (205, 304, 305), a metal vapor-deposited electrode, a metalized film (103, 206) including a dielectric film made of polypropylene and another metal vapor-deposited electrode formed on the dielectric film wound around the winding core, wherein the metal vapor-deposited electrode faces the another metal vapor-deposited electrode across the dielectric film interposed between the metal vapor-deposited electrode and the another metal vapor-deposited electrode, and wherein the capacitor element has a sectional shape formed in an oblong shape; and a pair of extraction electrodes provided on both end surfaces of the capacitor element, respectively, characterized in that the winding core has 5 to 10 windings of a polypropylene film having a thickness of 3 to 10 times as thick as the thickness of the dielectric film of the metalized film; in the oblong sectional shape "a/b" is not less than 3 and "a" is not less than 60 mm in which a major axis is denoted by "a" and a minor axis is denoted by "b"; and a distance from this winding core to a circumferential surface of the capacitor element is not more than 14 mm. a capacitor element including a winding core (205, 304, 305), a metal vapor-deposited electrode, a metalized film (103, 206) including a dielectric film made of polypropylene and another metal vapor-deposited electrode formed on the dielectric film wound around the winding core, wherein the metal vapor-deposited electrode faces the another metal vapor-deposited electrode across the dielectric film interposed between the metal vapor-deposited electrode and the another metal vapor-deposited electrode, and wherein the capacitor element has a sectional shape formed in an oblong shape; and a pair of extraction electrodes provided on both end surfaces of the capacitor element, respectively, characterized in that the winding core has 5 to 10 windings of a polypropylene film having a thickness of 3 to 10 times as thick as the thickness of the dielectric film of the metalized film; in the oblong sectional shape "a/b" is not less than 3 and "a" is not less than 60 mm in which a major axis is denoted by "a" and a minor axis is denoted by "b"; and a distance from this winding core to a circumferential surface of the capacitor element is not more than 14 mm. a winding core (205, 304, 305), a metal vapor-deposited electrode, a metalized film (103, 206) including a dielectric film made of polypropylene and another metal vapor-deposited electrode formed on the dielectric film wound around the winding core, wherein the metal vapor-deposited electrode faces the another metal vapor-deposited electrode across the dielectric film interposed between the metal vapor-deposited electrode and the another metal vapor-deposited electrode, and wherein the capacitor element has a sectional shape formed in an oblong shape; and a pair of extraction electrodes provided on both end surfaces of the capacitor element, respectively, characterized in that the winding core has 5 to 10 windings of a polypropylene film having a thickness of 3 to 10 times as thick as the thickness of the dielectric film of the metalized film; in the oblong sectional shape "a/b" is not less than 3 and "a" is not less than 60 mm in which a major axis is denoted by "a" and a minor axis is denoted by "b"; and a distance from this winding core to a circumferential surface of the capacitor element is not more than 14 mm. "a/b" is not less than 3 and "a" is not less than 60 mm in which a major axis is denoted by "a" and a minor axis is denoted by "b"; and a distance from this winding core to a circumferential surface of the capacitor element is not more than 14 mm.