Earlier, French carmaker Peugeot said it had agreed a joint venture in Iran worth €400m.
Mr Rouhani`s Europe tour comes after the lifting of international sanctions over Iran`s nuclear programme.
Mr Rouhani`s five-day visit to Italy and France is the first by an Iranian president in nearly two decades.
Iranian diplomats had reportedly requested that no wine be served at Mr Rouhani`s lunch meeting with French President Francois Hollande, leading French officials to postpone the meeting until after lunch.
`Seduced by Iran`
The Iranian president was received at a welcome ceremony on Thursday at the Invalides monument in Paris.
Mr Rouhani said: "The time is ripe for both countries to enhance their relations.
"Diplomacy at the negotiating table can be quite effective - it can through logic and prudence... resolve problems," he said.
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