The present invention provides a W/O/W emulsion producing device capable of easily adjusting W/O/W emulsion. The W/O/W emulsion producing device of this invention contains: a first cylinder 11 and a second cylinder 12 in which a liquid enclosed herein can be moved to each other a first dispersion film 13a, which allows a water phase containing an effective material to pass through, thereby dispersing the water phase into an oil phase to form a W/O emulsion a second dispersion film 13b, which allows the W/O emulsion to pass through, thereby dispersing the W/O emulsion into the water phase to form a W/O/W emulsion and a supporting 13 switching the dispersion film which allows the permission of liquid moved between the first cylinder 11 and the second cylinder 12, between the first dispersion film 13a and second dispersion film 13b.本發明係提供一種可簡便地調整W/O/W乳液之W/O/W乳液製造裝置。本發明之W/O/W乳液製造裝置係具備:第1筒體11及第2筒體12,係封入於內部的液體可相互地進行移動;第1分散膜13a,係使含有有用物質的水相穿透而使該水相分散於油相中而形成W/O乳液;第2分散膜13b,係使W/O乳液穿透而使該W/O乳液分散於水相中而形成W/O/W乳液;以及支撐體13,係在第1分散膜13a與第2分散膜13b之間切換用以使在第1筒體11與第2筒體12之間移動的液體穿透的分散膜。1‧‧‧W/O/W乳液製造裝置11‧‧‧第1筒體11a‧‧‧第1按壓構件12‧‧‧第2筒體12a‧‧‧第2按壓構件13‧‧‧支撐體13a‧‧‧第1分散膜13b‧‧‧第2分散膜13c‧‧‧橡膠層14a、14b‧‧‧密封層
