An atomizing head includes a heating assembly and an atomizing sleeve, the atomizing sleeve includes a first chamber and a second chamber in communication with each other, and the external airflow is successively flowing through the first chamber and the second chamber, and take away smoke formed by the aerosol forming substrate atomized by the heating assembly. The first chamber and the second chamber are spaced apart to effectively separate the airflow drawn from the outside with the second chamber. Since the airflow is completely passed through the entire atomizing head, it is difficult to form an effusion, the temperature of the heating element is substantially uniform everywhere, the airflow of the present disclosure is smooth, the heat conduction effect is good. In addition, the present disclosure uses a double heating assemblies, the amount of smoke is large and it is difficult to form an effusion.