An aromatic nebulizing diffuser includes a bottom holder shell, an electric fan, a fluid container, an oscillator, a circuit board, a power supply unit and a cover shell. The oscillator is adapted to oscillate an aromatic fluid in the fluid container into a mist of aromatic fluid droplets. The fluid container has a side block defining an air passage for guiding electric fan induced air into a pressurized space in between the cover shell and the fluid container to enhance the effects of mist diffusion. A rotating connection structure is provided between the bottom holder shell and the cover shell, facilitating general maintenance and cleaning activities.
