The 1998 Philippine Basketball Association (PBA) Centennial All-Filipino Cup, also known as the 1998 McDonald's-PBA All-Filipino Cup for sponsorship reasons, was the first conference of the 1998 PBA season.

It started on February 1 and ended on May 8, 1998.

The tournament is an All-Filipino format, which doesn't require an import or a pure-foreign player for each team.

The following format will be observed for the duration of the conference: Group A: Group B:

1997 1997