The protest will be held outside City Hall at 6pm today.
Speaking ahead of the protest, Megan Fearon said it is important to support the right of women throughout the world to education.
"We are calling for the immediate and unconditional release of these schoolgirls and I would urge everyone, particularly women to support tonight’s vigil,” said Megan Fearon.
“The kidnappers have vowed to sell these children into slavery and we must do all in our power to send them a message that the international community is abhorred by their actions.”
And West Belfast MLA Jennifer McCann said she was concerned it has taken the international community so long to respond to the kidnapping.
“This mass kidnapping happened more than three weeks ago yet the international community is only beginning to respond now,” said the Sinn Féin Junior Minister.
"The kidnappings send out a very disturbing message about the value of women in the developing world. It also poses a very serious threat to the basic universal right of women to education.
“It’s important that we send out a clear message from Belfast tonight of our solidarity with the schoolchildren and our disgust at the actions of the kidnappers.”