| 1990 Belgian Indoor Championships | |
|---|---|
| Date | 12–18 February |
| Edition | 9th |
| Category | Championship Series |
| Draw | 32S / 16D |
| Prize money | $465,000 |
| Surface | Carpet / indoor |
| Location | Brussels, Belgium |
| Venue | Forest National |
| Champions | |
| Singles | |
 Boris Becker[1] | |
| Doubles | |
 Emilio Sánchez /  Slobodan Živojinović[2] | |
The 1990 Belgian Indoor Championships was a tennis tournament played on indoor carpet courts. It was the 9th edition of the event known that year as the Belgian Indoor Championships, and was part of the ATP Championship Series, double-week events of the 1990 ATP Tour, running concurrently with the 1990 SkyDome World Tennis Tournament. It took place at the Forest National in Brussels, Belgium, from 12 February until 18 February 1990. First-seeded Boris Becker won the singles title.
- ^ "1990 Brussels Singles draw". Association of Tennis Professionals (ATP).
- ^ "1990 Brussels Doubles draw". Association of Tennis Professionals (ATP).