To provide a thickening composition and cosmetic that are easily liberated via a mesh material, spread uniformly when applied to the skin, and provide a smooth and free-flowing feeling. A thickening composition for a cosmetic, the contents of which are liberated via a mesh material, said composition containing an ultra fine powder and a silicone cross polymer having a structure in which dimethicone is crosslinked by an organic group, wherein a storage modulus G' is at least 3,000 Pa as measured by a rheometer while increasing the stress in a 25 mm [phi] cone plate at a gap of 0.5 mm, a strain of 0.1%, a frequency of 1 Hz, and a temperature of 25 DEG C, and the loss tangent tan [delta], which is determined as the loss modulus G"/the storage modulus G' measured under the same conditions as above, is not more than 0.2. A cosmetic comprising a container provided with an inner lid in which the mesh material is stretched and an outer lid for sealing the container body, and the thickening composition accommodated in the container body below the inner lid.本發明提供一種容易經由網素材取出，且於塗抹於肌膚之情形時可均勻地延展並獲得柔滑且乾爽之感觸的增黏組合物及化粧品。 本發明係一種增黏組合物，其係經由網素材取出收容物之化粧品用增黏組合物，且其含有具有聚二甲基矽氧烷經有機基交聯之結構的聚矽氧交聯聚合物及微粒子粉末，藉由流變儀於間隙0.5 mm、應變擺轉角0.1%、頻率1 Hz、溫度25℃之條件下利用25 mmΦ之圓錐平板一面使應力增加一面進行測定時，儲存彈性模數G'為3000 Pa以上，且該條件下之以損失彈性模數G''/儲存彈性模數G'之形式求出之損失正切tanδ為0.2以下。本發明係一種化粧品，其係具有以下部分而成：容器，其具備張設有網素材之中蓋、及密封容器本體之外蓋；以及上述增黏組合物，其係收容於中蓋之下部且容器本體內。
