"A Royal Air Force aircraft laden with huge quantities of humanitarian aid and other supplies to the Iraqi people... landed at the Ain al-Assad airport" in Anbar, a statement said.
King Abdullah II ordered the dispatch of aid to Anbar "as part of efforts to boost cooperation between Jordan and Iraq, and alleviate the suffering of the Iraqi people in view of the current situation in their country."
IS spearheaded a major offensive in June that overran much of Iraq's Sunni Arab heartland, including swathes of Anbar where the jihadists have launched a campaign of mass killings.
The executions have targeted members of the Albu Nimr tribe which has fought the IS.
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Anbar province, west of Baghdad, is across the border from Jordan.
The tiny desert kingdom has joined the US-led war on jihadists in Iraq and neighbouring Syria.
On Monday King Abdullah met visiting Iraqi Vice President Iyad Allawi to discuss coordination between the two countries to counter "terrorist organisations," a court statement said.