The present invention provide a liquid cleansing agent in a non-gas foaming container, of which the foam has delicate and creamy texture, good slidability to the skin, no sticky feeling during rinsing, and may bring good usage feeling for making skin softer after washing, and have good dispensing property. The liquid cleansing agent in a non-gas foaming container contains the following ingredients: (A) N-acyl amino acids or its salts in 2-10 wt.% for the acid (B) amphoteric surfactant in 0.2-3 wt.% (C) glycerin in 5-28 wt.% and (D) polyethylene glycol with quantity average molecular weight of 1500-20000 in 2-8 wt.%, wherein the mass ratio for the contents of ingredient (A) and ingredient (B) ((B)/(A)) is above 0.05 and below 1.5 the total content of ingredient (C) and ingredient (D) is 10-30 wt.% and, the viscosity of the liquid cleansing agent below 25 deg C is 1-20 mPa·s.本發明提供一種裝入無氣體起泡容器之液體洗淨劑,其泡沫紋理細膩呈乳油狀並且泡沫對肌膚之滑動性良好,沖洗時無黏滑感,而且洗完後之皮膚柔軟而帶來良好之使用感,並且亦具有良好之吐出性。一種裝入無氣體起泡容器之液體洗淨劑,其含有下述成分(A)、(B)、(C)及(D):(A)N-醯基胺基酸或其鹽以酸計為2質量%以上且10質量%以下、(B)兩性界面活性劑0.2質量%以上且3質量%以下、(C)甘油5質量%以上且28質量%以下、及(D)數量平均分子量為1500~20000之聚乙二醇2質量%以上且8質量%以下,且成分(A)與成分(B)之含量之質量比((B)/(A))為0.05以上且1.5以下,成分(C)與成分(D)之含量之合計為10質量%以上且30質量%以下,且液體洗淨劑於25℃下之黏度為1~20mPa.s。