Scrub brush or scrubbrush may refer to:
- Shrubland, an environmental habitat characterized by vegetation dominated by shrubs
- Silkworm (missile), a missile with the NATO reporting name "Scrubbrush"
- Tawashi, a Japanese traditional scrubbing brush
- Toilet brush, a scrubbing brush for cleaning toilets
- Investment, a security or asset expected to increase in value over time.