^<35>Cl NQR spectra for 2,6-dichlorobenzonitrile were observed at room temperature. The resonance frequencies were 36.675 and 36.732 MHz at 297 K. From Zeeman analysis, it was proved that the crystal belongs to a monoclinic system and there exist two physically nonequivalent sites in a unit cell. The angles between the C-Cl bonds within a molecule were estimated to be 120.78°±0.05° and 120.91°±0.04°. The asymmetry parameters at the chlorine atoms were 0.103±0.002 for the lower-frequency line and 0.104±0.002 for the higher-frequency one.