Monster Manual IV is an optional supplemental source book for the Dungeons & Dragons (D&D) role-playing game.

Each entry also contains a table listing DC ratings for skill checks made using the Knowledge ability.

In general, a low DC check results in revealing all the monster's subtype traits to the player, while higher ratings reveal their origins or various special offensive and defensive abilities.

Kestrel, Jennifer Clarke Wilkes, Matthew Sernett, Eric Cagle, Andrew Finch, Christopher Lindsay, Kolja Raven Liquette, Chris Sims, Owen K.C.

Cover art was by Henry Higginbotham, with interior art by Daarken, Wayne England, Carl Frank, David Hudnut, Howard Lyon, Raven Mimura, Jim Nelson, Steve Prescott, Wayne Reynolds, Ron Spencer, Anne Stokes, Arnie Swekel, Francis Tsai, Eva Widermann, Sam Wood, and James Zhang.