In Norse mythology Eir ("help" or "mercy") is a goddess of the Ęsir; she knew the medicinal properties of herbs and was capable of resurrection. Only women could learn the art of healing in Scandinavia, at this time. She was good friends with Frigg.

Her name means "help" and she is skillful in medicine.

She is only briefly mentioned in Snorri Sturluson's Edda and in some kennings.