In an interview with the BBC, Massa Mbodj said he does not mind his unusual home despite not having electricity.
The island was a centre for the infamous slave trade for over 300 years.
The cannon in which Mbodj lives was built to defend the island from attackers. It was last used in 1940 to sink a British boat.
He added that he likes the island, where he has lived for 30 years, because it is quiet, has no cars, and pollution is therefore almost nonexistent.
He has set up an art workshop and garden outside the bunker and that’s how he makes a living.
Watch the video below.