比利牛斯山犬（法语：Chien de montagne des Pyrénées），一般称作大白熊犬（英语：Great Pyrenees），或简称大白熊，是一种大型犬类。主要用作守护犬、救助犬和伴侣犬。

大白熊犬是一种历史悠久的犬类，已被牧羊人使用了数百年。大白熊犬最早在1407年被详细的描述，并于1675年被法国贵族所喜爱。 在19世纪初，有一个位于山区乡镇的繁荣犬类市场将该狗带到了法国其他地区。

The Pyrenean Mountain Dog, known as the Great Pyrenees in North America, is a large breed of dog used as a livestock guardian dog. It should not be confused with the Pyrenean Mastiff.

As late as 1874 the breed was not completely standardized in appearance, with two major sub-types recorded, the Western and the Eastern. They are related to several other large white European livestock guardian dogs (LGD), including the Italian Maremma Sheepdog, Kuvasz (Hungary), Akbash Dog (Turkey) and Polish Tatra or Polski Owczarek Podhalański, and somewhat less closely to the Newfoundland and St. Bernard. According to the Great Pyrenees Club of America, the Great Pyrenees is naturally nocturnal and aggressive with any predators that may harm its flock. However, the breed can typically be trusted with small, young, and helpless animals of any kind due to its natural guardian instinct.