The effect of Sr-2 (+) substitution on the electrical conductivity and chemical stability for Ba(1-x)SrxFe(0.9)In(0.1)O(3 -) (delta) prepared by the Pechini method was investigated. The specimens could be indexed as cubic perovskite structure with disordered oxygen vacancies (0 <= x <= 0.8). To evaluate the properties of Ba1-xSrxFe0.9In0.1O3 (-) (delta) thermogravimetry-differential thermal analysis and electrical conductivity measurements were performed under N-2 flow. These experiments revealed that the major charge carrier shifted from oxide ions to electron holes by the partial substitution of Sr-2 (+) into the Ba-2 (+)-site. The substitution resulted in an enhanced electrical conductivity; this may be caused by an increase in the mobility of electron holes.