A heater and a vaporization device using the same are provided. The heater comprises an end for insertion into a cartridge, a body having a sidewall and at least one opening on the sidewall, and a chamber inside the body. The end has an outlet. The chamber and the opening provide an airflow path for an aerosol to be vented outside the heater through the outlet. The aerosol is generated from the vaporizable material when the body is heated.