The objective of the study is to compare three classical models of stomatal conductance from Ball et al, Leuning, and the Lloyd's one in relation with the water content of the top soil estimated with the water balance model of Dufrên. Four agroecological zones which were used: La Mé (Ivory Coast), Pobé (Republic of Benin), Marihat (North Sumatera), Lampung (South Sumatera) and the respective period of each leaf gas exchange measurement present for this study an interesting scale of edaphic conditions for oil palm. Leaf gas exchange measurement have been done with the LCA2 (ADC England) in La Mé (Ivory Coast) on the control family LM2T x DA10D during Feb/April/Oct/Nov 1987, in Pobé on three clones (parent: LM10T x DA17D, LM10T x DA8D, LM10T x DA118D, plot 426/447, 1988) during Oct/Dec 1992, in Marihat (North Sumatera) on three clones during Feb/May 1994 and in Bekri (Lampung, South Sumatera) on three clones during September 1997. From the estimation of AWC (available water of the soil) with the water balance model of Dufrêne, it is possible to establish a very simple linear regression with observed values of stomatal conductance. This may be a good empirical base for coupling carbon and water balance model for oil palm, with the condition to calibrate precisely the water balance for larger soil scale. (Texte intégral)