Robert Denard (born Gilbert Bourgeaud; 7 April 1929 – 13 October 2007) was a French soldier of fortune and mercenary. Sometimes known under the aliases Gilbert Bourgeaud and Saïd Mustapha Mhadjou, he was known for having performed various jobs in support of Françafrique—France's sphere of influence in its former colonies in Africa—for Jacques Foccart, co-ordinator of President Charles de Gaulle's African policy.

Having served with the French Navy in the Algerian War, the ardently anti-communist Denard took part in the Katanga secession effort in the 1960s and subsequently operated in many African countries including Congo, Angola, Rhodesia (today Zimbabwe), and Gabon. Between 1975 and 1995, he participated in four coup attempts in the Comoro Islands. It is widely believed that his adventures had the implicit support of the French state, even after the 1981 election of the French Socialist Party candidate, François Mitterrand, despite moderate changes in France's policy in Africa.Born a Roman Catholic, Denard converted first to Judaism, then to Islam, and finally back to Catholicism again. He was polygamously married seven times, and fathered eight children.