Tenma a Japanese X-ray astronomy satellite launched in 1983.
Tenma may also refer to:
- Tenma goddesses, twelve guardian deities in Tibetan Buddhism
- Tianma or "heavenly horse" (Japanese reading Tenma), a creature similar to Pegasus in Eastern mythology
- Mara (demon) (also known as Tenma in Japanese), a malignant celestial king who tempted Gautama Buddha
- TENMA, a house brand of Premier Farnell, used for bench power supplies and electronic measuring equipment