We investigate the regional income inequality within industrial sector of the Mexican states. Mexican experience in this king of studies only exists for the total economy and it suggests that these differences have been accentuated in recent dates after they have experimented one stage of reductions. The analysis is carry on during the period 1960-1998 and it is supported in spatial econometric techniques. The results indicate that regional growth of the industrial sector has been quite heterogeneous. Techniques identify a rich cluster of states in the North and another cluster of poor states in the South of the country.