| Juani | |
| Fullname: | Juan José Castillo Barreto |
| Birth Date: | 3 October 1955 |
| Birth Place: | Las Palmas, Spain |
| Height: | 1.70m |
| Position: | Midfielder |
| Years1: | 1974–1983 |
| Caps1: | 223 |
| Goals1: | 55 |
| Years2: | 1983–1984 |
| Caps2: | 35 |
| Goals2: | 0 |
| Years3: | 1984–1985 |
| Clubs3: | CD Málaga |
| Caps3: | 18 |
| Goals3: | 2 |
| Years4: | 1985–1987 |
| Caps4: | 61 |
| Goals4: | 4 |
| Years5: | 1987–1989 |
| Clubs5: | Telde |
| Caps5: | 65 |
| Goals5: | 11 |
| Nationalyears1: | 1976 |
| Nationalcaps1: | 1 |
| Nationalgoals1: | 0 |
| Nationalyears2: | 1978 |
| Nationalcaps2: | 1 |
| Nationalgoals2: | 0 |
| Nationalyears3: | 1980 |
| Nationalcaps3: | 1 |
| Nationalgoals3: | 0 |
| Pcupdate: | 23:21, 4 November 2021 (UTC) |
Juan José Castillo Barreto (born 3 October 1955), better known as just Juani, is a Spanish footballer. He competed in the men's tournament at the 1976 Summer Olympics.[1]