Profundimitra planofilum is a species of sea snail, a marine gastropod mollusk in the family Mitridae, the miters or miter snails.

Color white, semitransparent at apex and porcelaneous near body.

Indo-Pacific, South China Sea, north to Taiwan and to the waters off Pratas Island, 200 to 600 m deep.

The holotype has been caught by a fishing boat off north Taiwan.

Two paratypes come from fishing boats working around Pratas Island.