The President of the Ivory Coast, Allasane Ouattara as well the President of Niger, Issoufou Mahamadou have also arrived for the conference.
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The meeting will provide a platform to deliberate on issues related to the ECOWAS single currency Programme and review strategies to accelerate the single currency by 2020.
The single Currency programme is in line with the vision of ECOWAS to transform the sub-region into an economic and monetary union.
In a related development, some roads in the capital will be blocked in order to ease traffic for the head of states that have arrived for the conference.
In a statement by the police, they said: "There will be a temporary closure of the Osu Cemetary Traffic Light on the Castle Road to AU Circle, intermittent closure on the Independence Avenue through 37 interchanges to AU circle."