| Juanjo Díaz | |
| Fullname: | Juan José Díaz Gallana |
| Birth Date: | 8 January 1949 |
| Birth Place: | Ciudad Real, Spain |
| Death Place: | Terrassa, Spain |
| Managerclubs1: | Muntanyesa |
| Managerclubs2: | Espanyol (youth) |
| Managerclubs3: | Menorca |
| Managerclubs4: | Espanyol (youth) |
| Manageryears5: | 1987–1990 |
| Managerclubs5: | Hospitalet |
| Manageryears6: | 1990 |
| Managerclubs6: | Español |
| Manageryears7: | 1990–1991 |
| Managerclubs7: | Mollerussa |
| Manageryears8: | 1991–1993 |
| Managerclubs8: | Palamós |
| Manageryears9: | 1993 |
| Managerclubs9: | Español |
| Manageryears10: | 1994–1995 |
| Managerclubs10: | Valladolid B |
| Manageryears11: | 1995–1996 |
| Managerclubs11: | Huesca |
| Manageryears12: | 1996–1997 |
| Managerclubs12: | Andorra |
| Manageryears13: | 1998–2000 |
| Managerclubs13: | Águilas |
| Manageryears14: | 2000–2001 |
| Managerclubs14: | Cornellà |
| Manageryears15: | 2001 |
| Managerclubs15: | Cartagena |
| Manageryears16: | 2001 |
| Managerclubs16: | Badajoz |
Juan José "Juanjo" Díaz Galiana (8 January 1949 – 6 December 2017), sometimes known simply as Juanjo, was a Spanish football manager.
RCD Espanyol appointed the little-known Diaz to replace Benito Joanet in January 1990.[1] Diaz would lead Espanyol to the 1989–90 Segunda División play-offs, where the club won promotion following a victory over CD Málaga. He left the club immediately after the play-offs.[2]
In June 2001 Juanjo was named as manager of second-division side CD Badajoz. That October, however, he was relieved of his duties after winning only two points out of a possible 27.[3]
He died in Terrassa, Catalonia, at the age of 68, following a long illness.[4]