To provide an aroma diffuser capable of diffusing aroma and medicinal effects that are superior tree components provided in natural wood such as cypress, Japanese cypress, and Japanese cedar, enclosing the tree components in unchanged form till opening it, and configured to be effectively used for bath agent and deodorant.

A wood aroma body 2 that is put in a breathable bag body 5 is stored in a container 3 of an aroma diffuser 1 having multiple vent holes 4 and 4' such that healthy characteristics of natural wood can be effectively utilized. An outer surface of the container 3 is closed and wrapped by a plastic film sheet 6.