Excess volumes have been measured by means of a continuous-dilution dilatometer for (N,N-dimethylformamide + benzene or toluene or o-xylene or m-xylene or p-xylene or ethylbenzene or styrene) at the temperature 298.15 K. VE is 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 : C6H5CH=CH2 > C6H5CH3 > p-C6H4(CH3)(2) approximate to C6H6 > m . C6H4(CH3)(2) > o-C6H4(CH3)(2) approximate to C6H5CH2CH3. The results show that there are quite strong interactions between N,N-dimethylformamide molecules and aromatic-hydrocarbon molecules.