Silver nanoparticles (Ag NPs) supported on selenium and nitrogen co‐doped mesoporous carbon were prepared through pyrolysis of glucose, ammonium chloride (NH4Cl), and selenium dioxide (SeO2) as the carbon, nitrogen, and selenium sources, followed by a chemical reduction strategy. The synthesized Ag/m‐SeNC could catalyze the hydrogenation of a series of nitroaromatics to corresponding amines effectively in an aqueous solution in the presence of NaBH4 as a hydrogen donor. Besides, this heterogeneous nanocatalyst could be simply reused four successive times without significant reduction in activity and selectivity.