SmB6behaves as a nonmagnetic semiconductor at low temperatures. Gd‐ and Eu doped samples have been prepared. The paramagnetic behavior of the doped materials shows that Eu remains divalent and consequently it does not alter the low‐temperature electrical properties appreciably. Gd, on the other hand, increases the electrical conductivity and the paramagnetic behavior corresponds to the trivalent Gd ion. The paramagnetic susceptibility flattens out below 0.1°K indicating a magnetic ordering of the Eu samples in contrast to the pure SmB6.