The main focus of King Salman's opening speech was Iran, which he criticised for "terrorist acts" and "blatant interference" in regional affairs, particularly the conflict in Yemen.
Leaders of several Arab countries will attend the summit and they will hold closed-door talks to discuss the summit agenda.
HM the King delivered a speech in which he extended thanks and appreciation to the Custodian of the Two Holy Mosques King Salman bin Abdulaziz Al-Saud for inviting him to take part in the Arab Summit.
The Saudi King also presented the kingdom's initiative and willingness to deal with the challenges that the Arab national security is facing.
HM the King also paid tribute to the Arab League Secretary-General, Ahmed Aboul Gheit, and the Arab League Secretariat-General's staff for their efforts to prepare for the 29th Summit.
On Dec. 6, 2017, Trump announced his official recognition of Jerusalem as Israel's capital and instructed the relocation of the US embassy from Tel Aviv to the disputed holy city, which promptly triggered fury and condemnation throughout the Arab world.
The heads of the Arab League states condemn the alleged use of chemical weapons by the Syrian authorities, according to the final statement of the Arab League Summit.
In a ministerial meeting that was held on Thursday, the Saudi Minister of Foreign Affairs Adel Al-Jubeir said that Palestine and the situation there will top discussions at the Arab summit.
"We reiterate our rejection of the USA decision on Jerusalem", the king said in a speech in Dhahran in eastern Saudi Arabia.
Mr Trump then told reporters that the relationship between the two countries was "probably the strongest it has ever been", adding: "We understand each other".