An electronic cigarette includes a mouthpiece, an atomizer assembly, a first connecting assembly, a second connecting assembly, and a power assembly. The atomizer assembly is received in the first housing of the mouthpiece, which includes a liquid reservoir and a heating element. The first connecting assembly includes a first conductive tube, a second conductive tube, and a first sleeve. The first sleeve includes an insulation tube, a convex ring, and a connecting portion. The insulation tube is disposed between the first conductive tube and the second conductive tube the convex ring is sleeved on the second conductive tube and fixed to the first housing the connecting portion extends through the second conductive tube and interconnects the insulation tube and the convex ring. The second connecting assembly includes a second sleeve and a flexible conductive ring. The power assembly includes a second housing fixed to the first housing and a battery.
