An electronic cigarette (10), comprising an atomizing assembly (100) and a power supply assembly (300) connected in a detachable mode; the atomizing assembly (100) comprises a housing (120) and an atomizer (140) located in the housing (120); the housing (120) is provided with an abutment portion (160) therein; the atomizer (140) comprises a reservoir (142) and an atomizing element connected to the reservoir (142); the power supply assembly (300) comprises a first connecting portion (320) facing the atomizer (140); one end of the housing (120) facing the power source assembly (300) is provided with a second connecting portion (180) connected to the first connecting portion (320) in a detachable mode; one end of the atomizer (140) facing the power supply assembly (300) is provided with a third connecting portion (144); and when the first connecting portion (320) is connected to and fixed with the second connecting portion (180), the abutment portion (160) presses the atomizer (140) to enable the third connecting portion (144) to press against the first connecting portion (320).