肥皂草属（学名：Saponaria）是石竹科下的一个属，为多年生草本植物。该属共有约30种，分布于欧洲温带地区。

Saponaria is a genus of flowering plants in the pink family, Caryophyllaceae. They are native to Europe and Asia, and are commonly known as soapworts.

They are herbaceous perennials and annuals, some with woody bases. The flowers are abundant, five-petalled and usually in shades of pink or white.