紫貂(学名：Martes zibellina)，也叫黑貂、林貂，为哺乳纲鼬科动物。

紫貂形似黄鼬，体长30－40厘米，尾巴短而粗，长约11－19厘米，末端毛很长，耳朵大；身体为暗褐色，头部颜色较浅；爪很尖利，适合于爬树。

紫貂是一种特产于亚洲北部的貂属动物。它们分布于乌拉尔山、西伯利亚、蒙古、中国东北以及日本北海道等地。紫貂以其皮毛闻名，黑色的皮毛价值最高。

紫貂是在白天活动的猎食者。它们通过嗅觉和听觉猎取小型猎物，包括花栗鼠、松鼠、老鼠、小鸟和鱼类。有时它们也吃浆果和松果。

紫貂大多在森林的地面上筑巢，在天气恶劣或遭遇捕杀时下，它们会躲在巢穴中，甚至将食物储藏在里面。紫貂是一种比较凶残的动物，但驯养的紫貂也常常显得活泼好动而且比较“温驯”。

The sable (Martes zibellina) is a species of marten which inhabits forest environments, primarily in Russia from the Ural Mountains throughout Siberia, eastern Kazakhstan, northern Mongolia, China, North and South Korea and Hokkaidō in Japan. Its range in the wild originally extended through European Russia to Poland and Scandinavia. It has historically been hunted for its highly valued fur, which remains a luxury good to this day. While hunting of wild animals is still common in Russia, most fur in the market is now commercially farmed.