To produce -caprolactam with an industrially advantageous simple method comprising small number of steps in high conversion of each step, high productivity and decreased energy consumption under a mild reaction condition with simple operation and equipment essentially without producing ammonium sulfate as a by-product while dispensing with a reaction reagent necessitating a complicate process for preparation.

-Caprolactam is produced by using benzene as a starting raw material and successively subjecting the material to partial hydrogenation, nitration, partial hydrogenation and vapor-phase rearrangement reaction.