The 2008 Pacific Nations Cup was a rugby union tournament held between six national sides on the Pacific Rim: Australia A, Fiji, Japan, Samoa, Tonga and New Zealand Māori (just for this year).

The inaugural competition was held in 2006.

This year the tournament started on 7 June and ended on 6 July 2008.

There are four points for a win, two for a draw and none for a defeat.

There are also bonus points offered with one bonus point for scoring four or more tries in a match and one bonus point for losing by 7 points or less.