A vaporizer includes: a liquid storage part for storing a liquid composition； an upper cap part coupled to the liquid storage part and including a through-hole into which the liquid composition of the liquid storage part is introduced； a lower cap part coupled to the upper cap part to form an aerosol generation space together with the upper cap part； a liquid transfer means disposed between the upper cap part and the lower cap part in the aerosol generation space and absorbing the liquid composition transferred from the liquid storage part； a sealing part which is disposed between the upper cap part and the lower cap part, includes a coupling groove for supporting at least one of the ends on both sides of the liquid transfer means, and is connected to the through-hole to transfer the liquid composition, introduced from the liquid storage part, to at least one of the ends on both sides of the liquid transfer means； a heating element for heating the liquid transfer means to generate an aerosol； and an angled part extending from the upper cap part toward the lower cap part to contact at least a portion of the liquid transfer means and closing the coupling groove of the sealing part and at least one coupling portion of the ends on both sides of the liquid transfer means to block the flow of the liquid composition from the sealing part toward the aerosol generation space.
