Gaster may refer to:
- Stomach (Greek: Gaster)
- Gaster (insect anatomy)
- a trade name of famotidine, an inhibitor of stomach acid production
- W. D. Gaster, a character from the video game Undertale.
- Gaster (surname)
- Gaster, a character in the television series PaRappa the Rapper
- Gaster (district), a constituency in St. Gallen, Switzerland
This disambiguation page lists articles associated with the title Gaster.If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: