were the defending champions, having won the 2003–04 Omani League season.

played out a 1–1 draw away in their final league match against Al-Nasr S.C.S.C.

and emerged as the champions of the 2004–05 Omani League with a total of 46 points.

This season the league had increased from 12 to 13 teams.

Al-Suwaiq Club and Saham SC were relegated to the Second Division League after finishing in the relegation zone in the 2003–04 season.