An atomizing device (100) of an electronic cigarette includes an atomizing sleeve (1) an oil reserving member (5) arranged in the atomizing sleeve and configured for reserving a tobacco oil an air pipe (41) extending through the oil reserving member, a porous body (42) and a heating coil (43). The air pipe has a clamping portion (411) formed thereon, and the porous body is clamped by the clamping portion and extending into the oil reserving member to absorb the tobacco oil. The heating coil wraps around the porous body and is configured for heating and atomizing the tobacco oil on the porous body. An electronic cigarette is also provided, which includes the atomizing device and a power supply configured for powering the atomizing device.
