In the title compound, C9H26N3
3+·3NO3
−, the triprotonated 1,1,4,7,7-pentamethyldiethylenetriamine molecules are linked to the nitrate anions by multiple bifurcated N—H⋯(O,O) and weak C—H⋯O hydrogen bonds. The organic cation is characterized by N—C—C—N torsion angles of −176.2 (2) and 176.6 (2)°.