Allegations of Israel's support for Iran during the Iran–Iraq war refer to the military support such as arms sales allegedly provided by Israel to Iran during the Iran–Iraq War from 1980 to 1988.
According to Ronen Bergman, Israel sold Iran US$75 million worth of arms from stocks of Israel Military Industries, Israel Aircraft Industries and Israel Defense Forces stockpiles, in their Operation Seashell in 1981. Materiel included 150 M-40 antitank guns with 24,000 shells for each gun, spare parts for tank and aircraft engines, 106 mm, 130 mm, 203 mm and 175 mm shells and TOW missiles. This material was transported first by air by Argentine airline Transporte Aéreo Rioplatense and then (after the 1981 Armenia mid-air collision) by ship.
According to Trita Parsi, President of the National Iranian-American Council, Israeli support for Iran consisted of several elements:
According to Mark Phythian, the fact "that the Iranian air force could function at all" after Iraq's initial attack and "was able to undertake a number of sorties over Baghdad and strike at strategic installations" was "at least partly due to the decision of the Reagan administration to allow Israel to channel arms of US origin to Iran to prevent an easy and early Iraqi victory."
Israeli arms dealer Yaacov Nimrodi apparently signed a deal with Iran's Ministry of National Defense to sell $135,842,000 worth of arms, including Lance missiles, Copperhead shells and Hawk missiles. In March 1982, The New York Times cited documents indicating that Israel had supplied half or more of all arms reaching Tehran in the previous 18 months, amounting to at least $100 million in sales. The Milan weekly Panorama reported that Israel had sold the Khomeini regime 45,000 Uzi submachine guns, anti-tank missile launchers, missiles, howitzers and aircraft replacement parts. "A large part of the booty from the PLO during the 1982 Lebanon campaign wound up in Tehran," the magazine claimed.