A pouch-type all-solid-state battery having a reference electrode and a method of manufacturing the same, includes: a unit cell including an anode portion, a cathode portion, and a solid electrolyte portion having a sheet shape and located between the anode portion and the cathode portion; and an external member including a space for accommodating the unit cell therein, wherein the solid electrolyte portion includes: an electrode accommodating portion in which the anode portion and the cathode portion are accommodated; and an extension portion having a predetermined area extending from a side surface of the electrode accommodating portion, wherein a reference electrode portion is positioned on one surface of the extension portion.