Info
| Last name | Demuysere |
| First name | Jef |
| Nationality |  Belgium |
| Date of birth | 26-07-1907 |
| Place of birth | Wervik |
| Passed away | 30-04-1969 |
| Age when passed away | 61 |
| Place of passing | Antwerpen |
Monuments
| Date | Rank | Race | |||||
|---|---|---|---|---|---|---|---|
| 16-06 | 2 | National Road Championships - Belgium (CN) | |||||
 Giro d'Italia (2.HC) | |||||||
| 07-06 | 3 | Stage 16Cuneo - Asti (91.0km) | |||||
| 02-06 | 2 | Stage 12Firenze - Montecatini Terme (134.0km) | |||||
| 22-05 | 2 | Stage 5bRiccione - Porto Civitanova (136.0km) | |||||