| Honorific Prefix: | General |
| Ignacio Alfaro Arregui | |
| Office: | President of the Board of Joint Chiefs of Staff |
| Term Start: | 12 September 1978 |
| Term End: | 15 January 1982 |
| Predecessor: | Felipe Galarza Sánchez |
| Successor: | Álvaro de Lacalle Leloup |
| Office2: | Chief of the Defence High Command |
| Monarch2: | Juan Carlos I |
| Term Start2: | 12 September 1978 |
| Term End2: | 19 May 1980 |
| Predecessor2: | Felipe Galarza Sánchez |
| Successor2: | Position abolished |
| Birth Name: | Ignacio Alfaro Arregui |
| Birth Date: | 3 May 1918 |
| Birth Place: | Burgos, Kingdom of Spain |
| Death Place: | Burgos, Spain |
| Rank: | Lieutenant general |
Ignacio Alfaro Arregui (3 May 1918 – 24 July 2000) was a Spanish military officer who served as Chief of the Defence High Command Spanish; Castilian: (Alto Estado Mayor, AEM) between 1978 and 1980, and as President of the Board of Joint Chiefs of Staff Spanish; Castilian: (Junta de Jefes de Estado Mayor, JUJEM) between 1978 and 1982. The offices he held made him chief of staff of the Spanish Armed Forces at the time.[1] [2] [3]