Isothermal vapor-liquid equilibria, VLE, excess Gibbs energies, G(m)(E), excess molar enthalpies, H-m(E) and m, excess molar volumes, V-m(E), were determined for the binary mixture trichloromethane + 1,2-epoxybutane at (288.15, 298.15, and 313.15)K and at atmospheric pressure. All excess properties are negative. The vapor-liquid equilibrium data are thermodynamically consistent and have been fitted to the Redlich-Kister equation. The influence of temperature has been discussed, and the relative magnitudes and signs of the excess properties have been outlined in terms of molecular interactions. Smooth representations of the results are presented.