An atomizer, comprising an atomizer body, and an atomizing core and a tobacco tar cavity (4) both arranged in the atomizer body, the atomizing core comprises an atomizing piece (51) and a strip-shaped tobacco tar guide body (52) which guides tobacco tar in the tobacco tar cavity (4) to an atomizing surface of the atomizing piece (51)； and the strip-shaped tobacco tar guide body (52) spreads across the atomizing piece (51) and props against the atomizing surface of the atomizing piece (51), and the area of a contact surface of the strip-shaped tobacco tar guide body (52) and the atomizing piece (51) is less than the area of the atomizing surface of the atomizing piece (51). The structural form of line contact is adopted in the atomizer, thus the time from the start of working of the atomizing piece (51) to the start of oscillation atomization is shortened, smoke is released quicker, and the phenomenon that the tobacco tar guide body (52) is difficult to atomize after being supersaturated due to too much tobacco tar absorption is not generated.
