蝴蝶花（学名：Iris japonica）是鸢尾科鸢尾属的植物。

多年生草本，具横生根状茎；剑形的叶子交互排列成两行；花茎高于叶子，分枝成疏总状花序，初夏开淡紫色蝶形花，故名；椭圆状卵圆形蒴果。

Iris japonica (also known as 'fringed iris', 'shaga' or 'butterfly flower') is a native of China and Japan. It is a species in the genus Iris, it is also in the subgenus of Limniris and in the Lophiris section. It is a rhizomatous perennial plant, with pale blue, lavender or white flowers with an orange or yellow crest. It is cultivated as an ornamental plant in temperate regions.