字码芋螺（学名：Conus litteratus），是新腹足目芋螺科芋螺属的一种。主要分布于印度尼西亚、中国大陆、**，常栖息在低潮线以下。

Conus litteratus, common name the lettered cone, is a species of sophisticated predatory sea snail, a marine gastropod mollusk in the family Conidae, the cone snail, cone shells or cones.

Like all species within the genus Conus, these snails are predatory and venomous. They are capable of "stinging" humans, therefore live ones should be handled carefully or not at all.