Pseudorhaphitoma multigranosa is a small sea snail, a marine gastropod mollusk in the family Mangeliidae.

(Original description) The strong, yellowish-brown shell is elongately pyramidal, with a short siphonal canal.

The subsequent whorls are slightly convex, with a deep suture, hexagonal by 6 continuous, rounded ribs.

Each of these spirals is closely covered with a row of granules, having the character of compressed squamae on the principal lirae.

The peristome is rather blunt, with a shallow sinus above and a strong rounded rib externally, 3 tooth-like tubercles in its interior, of which the uppermost is the largest.