圣伯纳德（Bernard of Clairvaux，1090年－1153年，又译作「圣伯尔纳铎」），克勒窝修道院院长，修道改革运动──熙笃会（Cistercian）的杰出领袖，被尊为中世纪神秘主义之父，也是极其出色的灵修文学作家。

圣伯纳德出生于第戒（Dijon）附近的一个法兰西贵族家庭。他受教宗贵格利七世（Pope Gregory VII）和克吕尼修道院（Abbey of Cluny）革新运动的影响，受过三艺制教育（trivium，文法、修辞学与逻辑学）。他本是有志从军，但十九岁那一年母亲去世，为遵从母亲遗志，于二十二岁（1112年），带着三十位亲友进入位于吉妥（Citeaux）荒僻河谷中的熙笃会修道院做了修道士。这是一所极为严格和热诚的修道院。三年后他即受委任为克勒窝修道院的院长。

Bernard of Clairvaux (Latin:Bernardus Claraevallensis), O.Cist (1090 – 20 August 1153) was a French abbot and the primary reformer for the Cistercian order.

After the death of his mother, Bernard sought admission into the Cistercian order. "Three years later, he was sent to found a new abbey at an isolated clearing in a glen known as the Val d'Absinthe, about 15 kilometres (9.3 mi) southeast of Bar-sur-Aube. According to tradition, Bernard founded the monastery on 25 June 1115, naming it Claire Vallée, which evolved into Clairvaux. There Bernard would preach an immediate faith, in which the intercessor was the Virgin Mary." In the year 1128, Bernard attended the Council of Troyes, at which he traced the outlines of the Rule of the Knights Templar, which soon became the ideal of Christian nobility.