"The question of compromise is not on the table," Odein Ajumogobia told AFP ahead of the special summit of the Economic Community of West African States.
"Something like a unity government or the sort of thing we have in Kenya and Zimbabwe are not on the table. We are resolute that Gbagbo has to step down,” he said.
Ecowas leaders were meeting in Abuja for the second time after suspending Côte d’Ivoire, who is an Ecowas member.
Officials attending the summit have been reluctant to say what might be on the table at this second summit. However, Some analysts say the bloc could decide to impose travel restrictions on Gbagbo.
The summit comes after the Central Bank of West African States blocked Gbagbo’s access to finances.
This week, the United Nations appealed to member states to support the UN mission in Côte D’Ivoire. UN Head Ban Ki-Moon says troops loyal to Gbagbo are disrupting supplies to the 9,000-strong mission.