Metal nitrido complexes are frequently invoked as key intermediates in numerous synthetic, catalytic and enzymatic transformations, such as C-N and H-N bond-formation, nitrogen atom/group transfer reactions and biological nitrogen fixation by nitrogenase enzyme. Ruthenium nitrido complex is one of the most important metal nitrido complexes. There is a growing interest in chemistry of Ru-nitride. Over the past decade, numerous chemically activated ruthenium nitrido complexes have been discovered. This short review summarizes recent advances in the synthesis and reactivity of these complexes.