Kadima (Hebrew: קדימה‎, lit. Forward) is a centrist and liberal political party in Israel. It was established on 24 November 2005 by moderates from Likud largely to support the issue of Ariel Sharon's unilateral disengagement plan, and was soon joined by like-minded Labor politicians. With Ehud Olmert as party chairman following Sharon's stroke, it became the largest party in the Knesset after the 2006 elections, winning 29 of the 120 seats, and led a coalition government. Although Kadima also won the most seats in the 2009 elections under Tzipi Livni's leadership, it became an opposition party for the first time after a Likud-led government was formed. On May 8, 2012, the party joined the governing coalition under Benjamin Netanyahu.

Prior to Kadima's formation, the political tug-of-war between Ariel Sharon and his right-wing supporters, both within the Likud and outside of it, was an on-going subject of speculation in Israeli politics and in the Israeli media. The expectation that Sharon would quit his own party to form a new party composed of his Likud allies and open the door to politicians from other parties to switch to the new party was dubbed the "big bang" (HaMapatz HaGadol) because it would result in a radical realignment of Israel's political landscape.