An electronic cigarette including an atomization assembly and a battery assembly. The atomization assembly includes a mouthpiece； a first spring disposed in a cavity of the mouthpiece； a first connection ring； a first seal ring sealing the first connection ring； a first fixed seat fixing the mouthpiece； a silicone gasket； a hollow rod； a first fixed ring fixing the hollow rod； a glass tube； a second seal ring and a third seal ring sealing two ends of the glass tube, respectively； a second fixed ring fixing the glass tube； an atomizer； a regulating ring； a second fixed seat fixing the atomizer； a fourth seal ring and a fifth seal ring sealing two ends of the second fixed seat, respectively； a second spring； a first threaded ring； a first insulation ring being sheathed on the atomizer； and a first joint directly connected to the atomizer.
