宿根亚麻（学名：Linum perenne）为亚麻科亚麻属下的一个种。

Linum perenne (perennial flax, blue flax or lint) is flowering plant in the family Linaceae, native to Europe, primarily in the Alps and locally in England.

It is a slender herbaceous perennial plant growing to 60 cm tall, with spirally arranged narrow lanceolate leaves 1–2.5 cm long. The flowers are pale blue, 2–2.5 cm diameter, with five petals.