New vapour pressure data for cyclopropane (c-C3H6) were obtained in the temperature range from 170 K to 225 K. The experimental data were fitted with an equation of the type In(p/kPa) = A + B/(T/K) + C.(T/K) + D.(T-2/K-2), yielding A = (3.70 +/- 2.13), B = (-1961.3 +/- 139.1), C = (6.80 +/- 1.09) . 10(-2) and D = (-1.26 +/- 0.18) . 10(-4). The results are compared with other values found in the literature.