Silicon nitride nanoceramic was fabricated from silicon nitride nanopowder prepared by high energy milling. An electric current assisted sintering was used for densification. Aluminium nitride nanoceramic was fabricated from aluminium nitride nanopowder, using the electric current assisted sintering. A liquid phase sintering is effective for the fabrication of the nanoceramics. Densification was acceralated and sintering temperature could be lowered by a liquid phase formed by reaction of sintering additives and oxide on the surface of nitride ceramic particles.