Setoeolis inconspicua is a species of sea slug, specifically an aeolid nudibranch. It is a marine gastropod mollusc in the family Facelinidae. It is the only species in the genus Setoeolis as identified by Baba & Hamatani, 1965.
The holotype of this species was found at Seto, Kii Province, Japan. It has been found at sites including Wakasa Bay on the Echizen coast and the Izu Peninsula.