Thin nickel-dimethylglyoxime Ni(DMG) 2 films of amorphous and crystalline structures were prepared by vacuum sublimation on glass and p-type Si substrates. The films were characterised by X-ray diffraction. The constructed Al/Ni(DMG) 2 /Si(p) MIS devices were characterised by the measurement of their capacitance as a function of gate voltage. The dc-electrical conduction of the Ni(DMG) 2 films grown on silicon substrate were studied at room temperature and in a temperature range of 293 -323 K. The dc current-voltage data of both amorphous and crystalline insulator follow the trap-charge-limited space-charge-limited conductivity mechanism with the characteristic trap energy E t of about 0.05 eV. The total concentration and the energy distribution of the traps were determined.