The 2004–2005 Liga Alef season saw Maccabi Tzur Shalom (champions of the North Division) and Hapoel Bnei Lod (champions of the South Division) winning the title and promotion to 2005–06.
At the bottom, Hapoel Tuba, Maccabi Tur'an (from North division), Hapoel Qalansawe and Hapoel Jaljulia (from South division) were all automatically relegated to Liga Bet.
The 12th placed club in Liga Alef North, Maccabi Shefa-'Amr, faced Liga Bet North A and North B runners-up, Hapoel Karmiel and Hapoel Umm al-Fahm. The teams played each other in a round-robin tournament, with all matches held at a neutral venue, Nahariya Municipal Stadium.
Hapoel Umm al-Fahm won the play-offs and was promoted to Liga Alef. Maccabi Shefa-'Amr remained in Liga Alef after Hapoel Majd al-Krum (which relegated from Liga Artzit to Liga Alef) folded during the summer.