A gas-insulated electric apparatus, comprising: a sealed container made of metal; a high-voltage conductor, housed within the sealed container, to receive voltage; an insulating support member to insulate the high-voltage conductor from the sealed container and support the high-voltage conductor to the sealed container; and a nonlinear-resistance film covering at least a portion of an inner surface of the sealed container, the portion being on a lower side of the inner surface with respect to the high-voltage conductor, wherein the nonlinear-resistance film is formed by particles of a nonlinear-resistance material and an insulating material, the particles of the nonlinear-resistance material being dispersed in the insulating material, characterized in that the nonlinear-resistance film is configured such that portions of the nonlinear-resistance material are revealed from the insulating material and the particles of the nonlinear-resistance material are placed in the insulating material such that a spacing between neighboring particles of the nonlinear-resistance material is smaller than a size of a conductive foreign object (9 in contact with the nonlinear-resistance material, so that one or more of the particles of the nonlinear-resistance material is configured to be in constant contact with the conductive foreign object thereby being trapped inside the sealed container, wherein, where a particle size of the nonlinear-resistance material is d, a size of the conductive foreign object trapped inside the sealed container and in contact with the nonlinear-resistance material is and a filling rate of the particles of the nonlinear-resistance material in the insulating material is Z, the nonlinear-resistance film is configured by using the nonlinear-resistance material having the particle size d and the filling rate Z that satisfy D < π d 4 3 Z − d. wherein the size D of the conductive foreign object is set to 0.2 mm for the nonlinear-resistance film. a sealed container made of metal; a high-voltage conductor, housed within the sealed container, to receive voltage; an insulating support member to insulate the high-voltage conductor from the sealed container and support the high-voltage conductor to the sealed container; and a nonlinear-resistance film covering at least a portion of an inner surface of the sealed container, the portion being on a lower side of the inner surface with respect to the high-voltage conductor, wherein the nonlinear-resistance film is formed by particles of a nonlinear-resistance material and an insulating material, the particles of the nonlinear-resistance material being dispersed in the insulating material, characterized in that the nonlinear-resistance film is configured such that portions of the nonlinear-resistance material are revealed from the insulating material and the particles of the nonlinear-resistance material are placed in the insulating material such that a spacing between neighboring particles of the nonlinear-resistance material is smaller than a size of a conductive foreign object (9 in contact with the nonlinear-resistance material, so that one or more of the particles of the nonlinear-resistance material is configured to be in constant contact with the conductive foreign object thereby being trapped inside the sealed container, wherein, where a particle size of the nonlinear-resistance material is d, a size of the conductive foreign object trapped inside the sealed container and in contact with the nonlinear-resistance material is and a filling rate of the particles of the nonlinear-resistance material in the insulating material is Z, the nonlinear-resistance film is configured by using the nonlinear-resistance material having the particle size d and the filling rate Z that satisfy D < π d 4 3 Z − d. wherein the size D of the conductive foreign object is set to 0.2 mm for the nonlinear-resistance film.