Atomizer and electronic cigarette having same

An atomizer, comprising:

• a housing;
• a mouthpiece;
• a liquid chamber arranged in the housing, the liquid chamber being configured for storing tobacco liquid, the liquid chamber defining an air passage, an end of the air passage being connected with the mouthpiece;
• and
• an atomizing component arranged in the liquid chamber, the atomizing component being configured for atomizing the tobacco liquid to form aerosol, the air passage allowing the aerosol to pass through, an opposite end of the air passage being in communication with the atomizing component;
• wherein the liquid chamber defines a liquid outlet at a bottom part, the liquid outlet is in communication with the atomizing component, so that the tobacco liquid in the liquid chamber can flow to the atomizing component via the liquid outlet;
• and
• wherein the atomizing component comprises a holder, a liquid conducting element nested in the holder, and a heating element arranged in the liquid conducting element, the liquid conducting element is hollow and defines an atomizing chamber, the holder comprises a sidewall, the sidewall defines a liquid inlet, and the liquid inlet is in communication with the liquid outlet, so that the tobacco liquid flowed into the atomizing component can permeate the liquid conducting element.