| Position: | Defence |
| Shoots: | Left |
| Ntl Team: | BOH |
| Ntl Team 2: | TCH |
| Birth Date: | 6 July 1885 |
| Birth Place: | Prague, Austria-Hungary |
| Death Place: | Prague, Protectorate of Bohemia and Moravia |
| Career Start: | 1906 |
| Career End: | 1925 |
Jan Maria Fleischmann (July 6, 1885 - September 23, 1939) was a Czechoslovak ice hockey player who competed in the 1924 Winter Olympics.
In 1924 he participated with the Czechoslovak team in the first Winter Olympics ice hockey tournament. His younger brother Miroslav was also a member of the squad.