| Justo Jacquet | |
| Fullname: | Justo Pastor Jacquet Muñoz |
| Birth Date: | 1961 9, df=yes |
| Birth Place: | San Ignacio Guazu, Paraguay |
| Height: | 1.87m (06.14feet) |
| Position: | Left back |
| Years1: | 1981–1988 |
| Clubs1: | Cerro Porteño |
| Years2: | 1989 |
| Clubs2: | Internacional |
| Caps2: | 10 |
| Goals2: | 0 |
| Years3: | 1990 |
| Clubs3: | Cerro Porteño |
| Caps3: | 24 |
| Goals3: | 4 |
| Years4: | 1991–1992 |
| Clubs4: | Belgrano de Córdoba |
| Caps4: | 6 |
| Goals4: | 0 |
| Years5: | 1992 |
| Clubs5: | Cerro Porteño |
| Years6: | 1993 |
| Clubs6: | Sport Boys |
| Years7: | 1994 |
| Clubs7: | 3 de Febrero |
| Years8: | 1994–1995 |
| Clubs8: | Presidente Hayes |
| Nationalyears1: | 1983–1991 |
| Nationalcaps1: | 40 |
| Nationalgoals1: | 0 |
Justo Pastor Jacquet Muñoz (born 9 September 1961) is a retired association football defender from Paraguay, who played as a left back during his career. He played professional football for Cerro Porteño in Paraguay and also had spells in Argentina, Brazil and Peru.
Jacquet made his international debut for the Paraguay national football team on 2 June 1983 in a friendly match against Uruguay (0-0). He obtained a total number of 40 international caps, scoring no goals for the national side. Jacquet represented his native country at four Copa América's: 1983, 1987, 1989 and 1991.