Magnetic and magnetocaloric properties of La1.4-XYbXCa1.6Mn2O7 system were studied. Polycrystalline samples with x = 0 and 0.2 were prepared by solid state reaction. Magnetic measurements show that Curie temperatures decrease from 246 K for x = 0 down to 211 K for x = 0.2. The temperature dependences of the magnetic entropy change DeltaS(M), show peaks close to the magnetic transition temperatures. Peak values of DeltaS(M) = 2.7 J/kg K and 2.1 J/kg K were obtained for compositions x = 0 and 0.2. The decrease in ASm when changing composition was correlated with the diminution of exchange interactions.