| Isidro B. Maiztegui | |
| Birth Date: | 14 July 1905 |
| Birth Place: | Gualeguay, Argentina |
| Death Date: | 29 May 1996 (aged 90) |
| Death Place: | Mar del Plata, Argentina |
| Othername: | Isidro Buenaventura Maiztegui Pereiro |
| Occupation: | Composer |
| Yearsactive: | 1938–1969 (film) |
Isidro B. Maiztegui (July 14, 1905 – May 29, 1996) was an Argentine composer who wrote a number of film scores.[1]