Scissurella costata is a species of small sea snail, a marine gastropod mollusk in the family Scissurellidae.

The spire is depressed, and composed of 4 whorls that are plane on their upper surfaces, strongly carinated at the periphery, and convex below the carina.

The simple lip is sinuous, with a narrow profound fissure.

The slit fasciole forms the carina of the whorls, with elevated, lamellar edges, and arcuate growth lamellae.

The surface is sculptured with arcuate longitudinal riblets, widely spaced and a little undulating, and fine spiral striae.