[en] The magnetic susceptibility of 13 intermediate valence Ce and Yb compounds was studied at room temperature as a function of pressure. Low temperature measurements showed a pressure induced shift of the susceptibility maximum for YbInAu² and Ce(Rhsub(0.7) Ptsub(0.3))². A general relationship between the pressure dependent activation energy and the fluctuation temperature is supposed for Yb compounds. The relative pressure dependence of the susceptibility has a maximum at the intermediate valence 2.5 and is decreasing toward integer valences. (TW)