五味子（学名：Schisandra chinensis）为木兰科五味子属下的一种植物。唐朝《新修本草》载“五味皮肉甘酸，核中辛苦，都有咸味”，所以得名。

多年生落叶藤本，茎长4～8米，灰褐色小枝。乳白色或淡红色小花，单生或簇生于叶腋，叶色深绿边缘为锯齿状，有细长的花梗。夏秋结球形浆果，聚合成穗状，秋后成熟时为紫红色。

Schisandra chinensis (五味子 in Chinese, pinyin: wǔ wèi zi, literally "five-flavor berry" which is its common name) is a deciduous woody vine native to forests of Northern China and the Russian Far East. It is hardy in USDA Zone 4. The plant likes some shade with moist, well-drained soil. The species itself is dioecious, thus flowers on a female plant will only produce fruit when fertilized with pollen from a male plant. However, a hybrid selection titled 'Eastern Prince' has perfect flowers and is self-fertile. Seedlings of 'Eastern Prince' are sometimes sold under the same name, but are typically single-sex plants.