The excess enthalpies of liquid alloys in the ternary systems Ag-Ga-Te and Ag-In-Te were determined in a heat flow calorimeter for four sections AgyGayTe with y = 0.2, 0.4, 0.5. and 0.6 at 1173 K, for the section Ag0.5Ga0.5-Te at 1073 K, for five sections AgyIn1-y-Te with y = 0.2, 0.4, 0.5, 0.6, and 0.8 at 1173 K, and fur the section Ag0.5In0.5-Te at 973 and 1073 K. The thermodynamic functions of the system Ag-Ga and Ag-In were optimized, using the association model and the Lukas program to get a reliable data base for the calculation of tel nary thermodynamic data. However, ternary interactions had to be considered for the analytical description of the excess enthalpies of the liquid Ag-Ga-Te and Ag-In-Te alloys. The enthalpy surface of both systems is characterized by a valley of exothermic minima from the congruently melting compound Ag2Te to Ga2Te3 or In2Te3. The numerical values of the enthalpies decrease with increasing temperature by dissociation of binary telluride associates.