An electronic cigarette, including an atomizing assembly and a battery. A first sealing ring is sleeved on an upper connector of atomizing rod. The upper connector is provided with grooves, facilitating a replacement of an atomizer. An atomizing rod is compressed on the upper connector. A threaded copper, a copper circular ring, and a heating wire presser are sleeved on the atomizing rod in that order, and are compressed on a lower connector of atomizing rod. The lower connector is adapted to fix an atomizer core, and the heating wire presser is adapted to support and tighten the atomizer core. The copper circular ring is adapted to ensure uniform forces on the members when the members are closely coordinating.