PURPOSE: A functional mask is provided to improve appearance thereof, facilitate communication between people, and to allow a natural image. CONSTITUTION: A functional mask comprises: a transparent mask body; a first coating layer(13) which is spread on one side of the mask body and is coated with optical material of which color is change by the light of a specific wave; a filter(30) which is combined with one side of the mask body and purifies air; and a second coating layer(14) which is spread in one side or the other side of the mask body and is coated with infrared absorbing material.
