Idelphonse Nizeyimana (born 5 October 1963) is a Rwandan soldier, who is alleged to have participated in the Rwandan Genocide. An ethnic Hutu, Nizeyimana was born in Gisenyi prefecture in 1963, in the same commune as President Juvénal Habyarimana. In 1994, he held the rank of captain in the Rwandan Armed Forces, and was the second-in-command, after Tharcisse Muvunyi, of the École des sous-officiers (ESO). He was convicted of ordering the execution of Queen Dowager Rosalie Gicanda at the beginning of the killings in Butare.