Abstract: An ozonizer including a hollow connecting member having a metal contact pin connected on one terminal of a high voltage generator, two wind guide shells fastened to two oppoiste ends of the connecting member, an insulative tube mounted inside the connecting member, a metal rod mounted inside the insulative tube and connected to one terminal of the high voltage generator for discharging a high voltage in an annular air tunnel within the connecting member outside the insulative glass tube for converting ozygen into ozone, permitting ozone to be guided out one wind guide shell.