The vaporization behavior of the intermetallic compound RuTe₂(s) was studied in the temperature range of 831–1148 K by the Knudsen effusion technique. As a prerequisite to the study, the nature of the vaporization equilibrium was first obtained. Phase analysis of the partially evaporated sample of RuTe₂(s) from thermogravimetric experiment carried out in inert environment showed the TG residue to be a biphasic mixture of Ru(s) and RuTe₂(s). This result together with the available thermodynamic information of Te vapor revealed that the compound incongruently volatilize as RuTe₂ (s)=Ru(s)+Te₂(g). The equilibrium vapor pressure of Te₂(g) derived from the measurement at the different temperatures could be expressed as ln(p/Pa)(±0.33) = – 33231.2/T + 33.67 (831 ≤ T/K ≤ 1148). The result of this study is discussed in the light of the reported data on the intermetallic compound.