An exemplary atomizer includes a liquid supply, a mouthpiece at a first end of the liquid supply, an air pipe, a liquid supply, and an atomizing device at an opposite second end. The atomizing device includes a main body, a liquid conducting element, and a heating element. The main body has an atomizing chamber. The liquid supply defines at least one air inlet at the first end. The air pipe and the liquid supply cooperatively define an annular air passage. The main body defines at least one liquid inlet and at least one air hole. The air passage is in communication with the atomizing chamber via the at least one air hole. The liquid supply has a housing, and the housing defines liquid outlets. The liquid outlets communicates with the at least one liquid inlet, and the liquid conducting element is configured for absorbing the tobacco liquid.