Disclosed is a nanoink composition which can impart electrical conductivity to a surface-protecting ligand layer of an inorganic nanoparticle and does not require any post-treatment such as the removal of ligands. Specifically disclosed is a nanoink composition comprising inorganic nanoparticles (
1
) and an organic n-conjugated ligand (
3
), and characterized in that the organic n-conjugated ligand (
3
) is bound to the inorganic nanoparticles (
1
) via n-conjugation to exhibit electrical conductivity.