The former Abia governor expressed that they should be given the same treatment as repentant Boko Haram insurgents and bandits.
This was contained in a statement issued on Tuesday by the lawmaker.
Kalu said granting them amnesty will improve unity in the country.
“I pleaded with most of our elders in the north and in the south-west; we cannot continue to fight at all times,” he said.
“I am still pleading with them and the federal government to intervene so that we can have a peaceful country. A lot of insurgents and bandits have been granted amnesty.
“I believe in the unity of this country, and I believe this country is better off being in unity, so the best way we can get it is to make sure that IPOB and followers of Sunday Igboho are granted amnesty.
“There is a need to call a roundtable, even without the federal government. This is what the elders can do and give the federal government for endorsement, so we can have peace in our country.
“If we continue this rancour, it wouldn’t augur well, because people are purchasing arms and they are not only being used for this struggle, they are used for kidnapping, banditry and other things, we don’t deserve this.”