四叶重楼（学名：Paris quadrifolia）为黑药花科重楼属的植物。分布于亚洲、欧洲以及中国大陆的**等地，目前尚未由人工引种栽培。

Paris quadrifolia, the herb-paris or true lover's knot, is a Eurasian species of flowering plant in the family Melanthiaceae, although authorities formerly regarded it as part of the Liliaceae family. It is related to Trillium, with which it can be confused. Trillium, however, is generally 3-merous (3 leaves per whorl, 3 petals etc.), whereas Paris quadrifolia is 4-merous.