It is an object of the present invention to provide a light-emitting element in which an inverted distribution state can be formed by exciting an organic compound with current at low current density, and moreover to provide a laser oscillator of a current excitation type using an organic compound as a laser medium. In a light-emitting element of the present invention, a molecule existing in a ground state is not directly excited by external energy but is excited by current fed to a first layer and a second layer which are provided adjacently so that ion species are accumulated in a region of the first layer that is in contact with the second layer.