The 2004–05 Liga Bet season saw Maccabi Sektzia Ma'alot (champions of the North A division), Hapoel Bnei Tamra (champions of the North B division), Maccabi Ironi Bat Yam (champions of the South A division) and Hapoel Arad (champions of the South B division) win their regional divisions and promoted to Liga Alef.
The runners-up in each division entered a promotion/relegation play-offs with the clubs ranked 12th in Liga Alef. In the north section, Hapoel Umm al-Fahm (from North B division) won the play-offs and was promoted. In the south section, Ironi Nes Tziona (from South B division) won the play-offs and was promoted.
At the bottom, Beitar Acre (from North A division) and Maccabi Bnei Tira (from South A division) were relegated to Liga Gimel, whilst Maccabi Majd al-Krum (from North A division) and Beitar Kiryat Ono (from South A division) folded during the season. However, Maccabi Daliyat al-Karmel, Hapoel Kafr Misr/Nein (from North B division) (from North B division), Moadon Tzeirei Rahat and Maccabi Yehud (from South B division), which finished in the relegation zone, were all reprieved from relegation, after several vacancies were created in Liga Bet for the 2005–06 season, mostly due to withdrawals of clubs.
During the season, Maccabi Majd al-Krum (after 11 matches) folded and its results were annulled.
1. Two points deducted
2. Three points deducted