纤维板（fiberboard）,也叫密度板，是人造板的一种，由木质纤维或其他植物纤维为原料，添加胶粘剂制成。根据其密度，分为低密度、中密度和高密度板。中密度板目前在家具广泛使用，通常也会在表面粘上带有木纹团，更加美观。

Fiberboard (American spelling) or fibreboard (Commonwealth spelling) is a type of engineered wood product that is made out of wood fibers. Types of fiberboard (in order of increasing density) include particle board, medium-density fiberboard, and hardboard. Fiberboard is sometimes used as a synonym for particle board, but particle board usually refers to low-density fiberboard. Plywood is not a type of fiberboard, as it is made of thin sheets of wood, not wood fibers or particles. Fiberboard, particularly medium-density fiberboard (MDF), is heavily used in the furniture industry. For pieces that will be visible, a veneer of wood is often glued onto fiberboard to give it the appearance of conventional wood.