Disclosed is an electronic cigarette (100), comprising a cylinder housing (1), and a liquid storage component (37) and an atomizer (21) provided in the housing (1), wherein an end of the housing (1) is provided with a suction nozzle cover assembly (4, 4′, 4″) for suction by a smoker, the suction nozzle cover assembly (4, 4′, 4″) comprises a suction nozzle primary cover (41, 41″) and a suction nozzle secondary cover (42, 42′, 42″) cooperating with the suction nozzle primary cover (41, 41″), the suction nozzle primary cover (41, 41″) is inserted into the housing (1) and fixed to an inner wall of the housing (1), the suction nozzle secondary cover (42, 42′) is inserted into and fixed to the suction nozzle primary cover (41) and alternatively, the suction nozzle secondary cover (42″) is inserted and fixed to the inner wall of the housing (1), a cooling cavity is formed between the suction nozzle primary cover (41, 41″) and the suction nozzle secondary cover (42, 42′, 42″), and both the suction nozzle primary cover (41, 41″) and the suction nozzle secondary cover (42, 42′, 42″) are provided with a ventilation hole (412, 421, 421′, 412″, 412″) in communication with the cooling cavity. This electronic cigarette can reduce or avoid the possibility of a smoker inhaling cigarette liquid, and improve the safety of use.