Thermodynamic modelling of the Ca-Pb system was carried out. The thermodynamic parameters were determined using available experimental information: phase diagram data and thermodynamic quantities. For this system, the liquid phase was described from the association model with the "Ca2Pb" associated complex. The calculations well restore experimental values. All the results so-obtained (optimised thermodynamic parameters and calculated phase diagram) are reported in this paper and discussed. (C) 2004 Elsevier B.V. All rights reserved.