A skin treatment composition of the present invention is an external composition for skin comprising an alkylene oxide derivative expressed by Formula (I): R.sup.1O--[(AO).sub.m(EO).sub.n]--R.sup.2 (I) wherein AO is an oxyalkylene group of C.sub.3 or C.sub.4; EO is an oxyethylene group; m and n are 1.ltoreq.m.ltoreq.70 and 1.ltoreq.n.ltoreq.70 respectively, wherein EO is 20.about.80% by weight with respect to a total of AO and EO; each of R.sup.1 and R.sup.2 is a hydrogen or a hydrocarbon group having C.sub.1-4. The alkylene oxide derivative (I) has a moisturizing effect, a rough skin improving effect, a stickiness improving effect, and a transdermal absorption promoting effect. When a refreshing agent is used together therewith in the composition of the present invention, the refreshing effect lasts for a long time and it is excellent in feeling of use without skin stimulation.