Mohammad-Ali Mokhtari, Mostafa Kiani, Ali Nazem and Moslem Mesigar scored one goal each one for Iran and Mohammad Ahmadzadeh scored Iran's other two goals in the game.
Iran has been pitted against the US, Egypt and Russia in Group B of the competitions, according to IRNA.
Mohammad-Hossein Mir-Shamsi's men are scheduled to play their second game against Egypt on Wednesday.
EghtesadOnline: Iran defeated the US 6-2 on Tuesday to take the first step firmly in Beach Soccer Intercontinental Cup underway in Dubai, UAE