Primera División A (Méxican First A Division) is a Mexican football tournament.
This season was composed of Invierno 1997 and Verano 1998 tournaments.
The promoted club was Pachuca after winning the Campeón de Ascenso final.
Source: Memoria Futbolera (subscription required)
Source: Memoria Futbolera (subscription required) The super cup matches of the Primera División A between the Invierno 1997 champions and the Verano 1998 champions to determine the winners of the promotion to Primera División.