The invention relates to an electronic cigarette, which comprises a smoking set, a charging port, a rechargeable battery, a supporting seat and a smoke cartridge, the smoke cartridge is installed at the top end of the interior of the smoking set, connecting structures are arranged on the two sides of the smoke cartridge, each connecting structure comprises an elastic groove, a reset spring, an arc-shaped clamping block and a limiting hole, and one side of each elastic groove is fixedly connected with one side of the smoke cartridge; a reset spring is fixedly connected to one side of the interior of the elastic groove, an arc-shaped clamping block is fixedly connected to one side of the reset spring, and limiting holes are formed in the two sides of the smoking set. The connection between the smoking set and the smoke cartridge is optimized by arranging the connecting structure, the smoke cartridge is vertically inserted into the smoking set, the arc-shaped clamping block shrinks towards the elastic groove and slides downwards in the mode of being tightly attached to the inner side wall of the smoking set, and when the arc-shaped clamping block slides to the horizontal position of the limiting hole, the arc-shaped clamping block is inserted into the limiting hole under the influence of the elastic force of the reset spring, and the arc-shaped clamping block and the limiting hole are firmly fixed together, so that the connection between the smoking set and the smoke cartridge is more stable.