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 . <EOS>