The 2017–18 Israeli Basketball Premier League, for sponsorship reasons Ligat Winner, was the 64th season of the Israeli Basketball Premier League. Hapoel Jerusalem is the defending champion.

Ligat HaAl, or the Israeli Basketball Premier League, is the top-tier level league of professional competition in Israeli club basketball, making it Israel's primary basketball competition. The league's name is abbreviated as either BSL or ISBL. For sponsorship reasons, the league is also referred to as Ligat Winner Sal, lit. Winner Basket League, with "Winner" being the name of a game operated by the league's primary sponsor, Toto Winner.