The 2009–10 Liga Bet season was the first season since the 1998–99 Liga Bet season, in which Liga Bet regained its status as the fourth tier of Israeli football, due to the closure of Liga Artzit.
Ahi Acre (champions of the North A division), Hapoel Daliyat al-Karmel (champions of the North B division), Maccabi Kabilio Jaffa (champions of the South A division) and Bnei Eilat (champions of the South B division) won the title and promotion to Liga Alef.
The clubs ranked 2nd to 5th in each division entered a promotion play-off, at the end of which, in the North section Hapoel Ramot Menashe Megido won against Hapoel Bnei Jadeidi from Liga Alef North and was promoted to Liga Alef, while in the South section, Ironi Ramla lost to Shimshon Bnei Tayibe from Liga Alef South and failed to gain promotion.
At the bottom, Hapoel Halat el-Sharif Tamra (from North A division), Hapoel Bnei Musmus/Ma'ale Iron (from North B division), Hapoel Ramat Israel (from South A division) and Hapoel Tirat Shalom (from South B division) all finished bottom and were all automatically relegated to Liga Gimel.
The clubs ranked 12th to 15th in each division entered a relegation play-off, at the end of which Maccabi Kabul (from North A division), Beitar Ihud Mashhad (from North B division), Otzma F.C. Holon (from South A division) and Maccabi Be'er Ya'akov (from South B division) dropped to Liga Gimel as well.