We have reinvestigated the NO dimer cation, (NO)(2)(+), both in the gas phase by high-resolution zero kinetic energy-pulsed field ionization (ZEKE-PFl) photoelectron spectroscopy and by infrared absorption spectroscopy in a solid neon matrix. Comparison of the results leads to the conclusion that the matrix infrared absorption bands previously assigned to the anion are actually due to the NO dimer cation. This reassignment also implies that the cation has a centrosymmetric trans structure.