PROBLEM TO BE SOLVED: To provide an organically modified clay mineral-based emulsifying agent capable of exhibiting a W/O stabilization effect even under a low viscosity and giving W/O emulsion excellent in use feeling, and a W/O emulsion by using the same.SOLUTION: The organically modified clay mineral oily gel composition is characterized by containing (i) the organically modified clay mineral of plate like particles having &le0.1 &mum mean thickness and 0.5 to 50 &mum mean longer diameter, (ii) a nonionic surfactants and (iii) an oil component, wherein the oil component (iii) contains a COOH group and/or an OH group in the molecule of the oil component. A W/O emulsion prepared by using the same is also provided.COPYRIGHT: (C)2009,JPO&INPIT【課題】低粘度においてもW/O安定性化効果を発揮することができ、使用感に優れるW/O乳化物を与えることができる有機変性粘土鉱物系乳化剤、ならびにこれを用いたW/O乳化物を提供する。【解決手段】(i)平均厚さが0.1μm以下、平均長径が0.5~50μmである板状粒子である有機変性粘土鉱物と、(ii)非イオン性界面活性剤と、(iii)油分と、を含有し、(iii)油分が分子内にCOOH基及び/又はOH基を有する油分を含むことを特徴とする有機変性粘土鉱物油性ゲル組成物、及びこれを用いたW/O乳化物。【選択図】図8