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| Dates | August 2–14, 1998 | |||||||||
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| Television | VTV (IBC) | |||||||||
| Radio network | DWFM | |||||||||
The 1998 PBA Commissioner's Cup finals was the best-of-7 basketball championship series of the 1998 Commissioner's Cup, and the conclusion of the conference's playoffs. The Alaska Milkmen and San Miguel Beermen played for the 70th championship contested by the league, this serves as a rematch of their All-Filipino series.
The Alaska Milkmen won their 9th PBA title, defeating the San Miguel Beermen for the second time in the season, winning in six games. It was the third straight crown for Alaska, which had been into the finals series in 12 of the last 13 conferences as they continued their quest for another Grandslam season.
Kenneth Duremdes won on his second back-to-back finals MVP in Commissioner's Cup finals.