PURPOSE: A diffuser is provided to enhance a sterilizing function and a purifying function and to prevent the surface oxidation of a diffuser. CONSTITUTION: A diffuser includes a body part(100), a cap part(200), and a power part(300). The body part is based on ceramics and includes a heating part and a raw material receiving part. The cover part is based on ceramics. A combining part is arranged at the lower side of the cover part. The combining part is inserted into the body part to be engaged with the inner wall of the raw material receiving part. An electric wire part passes through an opening at the body part and applies power to the heating part.본 발명에 따른 디퓨져는 발열부와 원료수용부를 포함하여 이루어지는 몸체부, 상기 몸체부 상에 상기 몸체부와 끼움결함되어 배치되는 뚜껑부, 및 상기 발열부에 전원을 제공하는 전원부를 포함하고, 상기 몸체부와 상기 뚜껑부는 도자기를 포함하여 이루어진다.
