United states president advised Russia and Turkey to ease tension after a week Turkish jets shot down a warplane from Russia.
Mr obama said : we all have a common enemy referring to the Islamic State (ISIS) group.
And i want to make sure that we focus on that threat he said.
Also Mr Erdogan spoke to some of reporters after the meeting on Tuesday's with Us president Mr obama.
Mr erdogan and Mr obama are both among the 150 leaders attending the meeting about climate talks in Paris.
Mr Erdogan renewed his criticism of Russian air strikes against Turkmen rebels in north-western Syria, complaining that the area is being "continuously bombed.
Russia is a major ally of Syrian President Bashar al-Assad and its air strikes have targeted rebel groups, including IS.
However, Mr Obama said he expected Russia would eventually be convinced of the need for Mr Assad to leave power.
Turkey and Russia have important economic links. Russia is Turkey's second-largest trading partner. More than three million Russian tourists visited Turkey last year.
