Excess molar volumes of binary chlorobenzene + 1,1-oxybisbutane, chlorobenzene +n-heptane, chlorobenze + 2,2,4-trimethylpentane, chlorobenzene + cyclohexane and chlorobenzene +n-octane mixtures have been measured at 298.15 K. For the first three systems,VEmis negative throughout the entire concentration range.VEmis positive for the chlorobenzene + cyclohexane system, and both positive and negative for mixtures containing chlorobenzene andn-octane depending upon mole fraction composition.