Atomizer and cartridge including the same

A cartridge comprising:

• a liquid storage configured to store an aerosol generating material;
• and
• an atomizer configured to heat the aerosol generating material to generate aerosol,
• wherein the atomizer includes:
• a liquid delivery element configured to absorb the aerosol generating material;
• and
• a wire configured to heat the aerosol generating material and wound on a surface of the liquid delivery element,
• wherein the wire is wound in a spiral shape such that coils of the wire are spaced apart from each other by a certain distance on the surface of the liquid delivery element,
• wherein one of end portions of the wire is in contact with a first portion of the surface of the liquid delivery element, and the other one of the end portions of the wire is in contact with a second portion of the surface of the liquid delivery element, and
• wherein at least one of the end portions of the wire comprises a ridge portion wound to be spaced apart from the liquid delivery element by a certain distance.