The world should "not let itself be duped by the untrustworthy declarations of the Iranian president," Netanyahu said, according to a statement issued by his office.
"This same Rowhani has deceived the international community in the past" in discussions over the country's disputed nuclear programme," an apparent reference to the time when he was Tehran's chief nuclear negotiator.
Israel, along with the United States and other major world powers, suspects Iran of using its nuclear energy programme as a cover for developing an atomic bomb, allegations Tehran roundly denies.
Netanyahu said Iran is "pursuing its nuclear programme. They are engaging in a media campaign while continuing to turn the centrifuges" that enrich the uranium.
In an interview with US television network NBC, Rowhani reached out to the United States, Iran's long-time foe.
The gesture was seen as past of a cautious game of diplomatic rapprochement as Tehran and Washington -- deadlocked over several key issues including Iran's controversial nuclear ambitions -- appear to be seeking to resolve their differences.
