The present disclosure discloses an electronic cigarette, including a power supply device with an installation groove and an atomizing device; either the installation groove or the atomizing device is provided with a protruded elastic buckle, and the elastic buckle can be slid perpendicularly along the installation direction of the atomizing device; the other one is provided with a buckle slot matching the elastic buckle. When the atomizing device is installed into the installation groove, the elastic buckle will be engaged in the buckle slot to form a disassemble connection between the atomizing device and the power supply device. When the elastic buckle is slid, the elastic buckle will come out of the buckle slot, so that the atomizing device can be taken out from the installation groove.