Excess volumes for binary liquid mixtures of N, N-dimethylformamide andN, N-dimethylacetamide with ethylacetate,n-propylacetaten-butylacetate, iso-propylacetate and iso-amylacetate have been measured at 303.15 K. Excess volumes are negative in all the systems over the entire range of composition. The results have been discussed in terms of specific interactions between like and unlike molecules and the difference in size and shape of the component molecules.