Metathesis of propane into n-butane and ethane using a tandem catalytic system consisting of two catalysts (PtSn/Al2O3 for dehydrogenation of alkane and hydrogenation of alkene, and Re2O7/Al2O3 for alkene metathesis) has been investigated. When the temperatures of two catalyst-beds are controlled independently, this system shows high conversion and is selective for the formation of n-butane.