Name  | active from | active to | |
| Janda, Dalibor | 1980 | | |
| Janda, Petr | 1959 | | |
| Jandova, Lada | | | |
| Jandova, Zora | | | |
| Janecky, Jaroslav | | | |
| Janis Joplin Revival | 1996 | |  |
| Jankeje, Jan | 1969 | | |
| Janota 1935 | 1994 | | |
| Janota-Fidler-Richter | 1983 | 1985 | |
| Janota, Oldrich | 1970 | 2024 | |
| Janousek-Vondrak | | | |
| Janousek, Slavek | 1970 | | |
| Janouskova, Atka | 1950 | | |
| Janu, Petra | 1972 | | |
| Jarmark | 1986 | | |
| Jarret | 1992 | | |
| Jasna paka | 1981 | 1984 | |
| Javorsky Vladimir | | | |
| Javory | 1974 | | |
| Javory beat | 2009 | | |
| Jazz Celula | 1968 | 1984 | |
| Jazz Famelia | 2009 | | |
| Jazz Fragment | 1975 | | |
| Jazz Q | 1964 | | |
| Jazz sanatorium | 1970 | 1979 | |
| Jazzove kvarteto Ladislava Gerhardta | 1961 | 1963 | |
| Jazzove studio Cs. rozhlasu | 1962 | 1965 | |
| Jednofazove kvasenie | 1982 | | |
| Jeff Biograf | 1993 | | |
| Jelinek, Jiri | 1970 | 1977 | |
