In his first address to the nation since assuming power, Tamim said his country "rejects divisions in Arab societies on sectarian lines," in reference to Sunni-Shiite tensions convulsing the region.
"We seek to preserve relations with all governments and countries and we respect all sincere, active and effective political directions in the region but we do not support one side over the other," said the 33-year-old emir.
Sheikh Tamim came to power after his father Sheikh Hamad abdicated in his favour yesterday, becoming the youngest Gulf Arab ruler.
Sheikh Hamad strongly supported rebels fighting the regime of Syrian President Bashar al-Assad but his son in his speech made no reference to the conflict, which has left more than 100,000 people dead and has spilled over into neighbouring states.