Excess volumes have been measured by means of a continuous-dilution dilatometer for [(1 - x)C6H5CH2CN + x{C6H6 or C6H5CH3 or o-(CH3)(2)C6H4 or m-(CH3)(2)C6H4 or p-(CH3)(2)C6H4 or C6H5C2H5 or C6H5CH:CH2}] at the temperature 298.15 K. Values of V-m(E) are negative over the entire range of composition for all mixtures. V-m(E)(minimum) and V-m(E)(x = 0.5) values of this series decrease in the sequence : C6H5CH3 > C6H5CH2CH3 > p-C6H4(CH3)(2) > m-C6H4(CH3)(2) > o-C6H4(CH3)(2) > C6H5CH:CH2 > C6H6. The results shows that there are guile strong interactions between nitrile molecules and aromatic-hydrocarbon molecules.