The 56-year-old English singer was treated after doctors found a small cancerous tumour at the back of his tongue, reported Aceshowbiz. The course finished yesterday.
The band announced the news in a statement posted on its website yesterday.
"Just before Christmas, Maiden vocalist Bruce Dickinson visited his doctor for a routine check-up. This led to tests and biopsies which revealed a small cancerous tumour at the back of his tongue. A seven week course of chemotherapy and radiology treatment was completed yesterday.
The band asked for privacy in this matter until May. "In the meantime we would ask for your patience, understanding and respect for Bruce and his family's privacy until we update everyone by the end of May. Bruce is doing very well considering the circumstances and the whole team are very positive," the band said.