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 | |||||
|---|---|---|---|---|---|---|---|
 Giro d'Italia (2.HC) | |||||||
| 11 |  Standings | ||||||
| 10-06 | Stage 17Bassano del Grappa - Milano (315.0km) | ||||||
| 29-04 | 4 |  Paris - Tours (CDM) | |||||
| 26-03 | 1 | Milano-Sanremo (CDM) | |||||