A power unit of a non-combustion type aspirator according to an aspect of the present invention includes a housing having a pressure variation chamber in which a communication port communicating with a misting unit accommodating an aerosol source is opened, and a normal pressure chamber partitioned with a partition member interposed with respect to the pressure variation chamber； a chargeable and dischargeable power accommodated in the normal pressure chamber； a first substrate module having a pressure sensor mounted thereon and accommodated in the housing so that at least the pressure sensor is exposed to the pressure variation chamber； and a second substrate module accommodated in the normal pressure chamber on a side opposite to the first substrate module with the power interposed therebetween and having a female connector mounted thereon.本發明的一態樣之非燃燒式吸嚐器的電源單元係具備有：外殼，具有壓力變動室及常壓室，該壓力變動室之與供收容霧氣源之霧化單元連通的連通口係形成開口，該常壓室係相對於壓力變動室以在其間隔有區隔構件之方式被區劃出；可充放電的電源，收容在常壓室內；第一基板模組，供安裝壓力感測器，並且以至少壓力感測器露出於壓力變動室內的方式被收容在外殼內；以及第二基板模組，於常壓室內，在與第一基板模組之間隔著電源而被收容在與第一基板模組為相反之側，且安裝有母連接器。
