踝节目（Condylarthra）是已灭绝的有胎盘类哺乳动物，主要生存于古新世及始新世。踝节目是古新世最有特色哺乳动物，并显示了古新世哺乳动物群的演化程度。

与食虫类动物的祖先相比，踝节目成员显示了演化成杂食性或草食性的最初迹象。大型的陆上草食性动物自从恐龙的灭绝后就消失了，食性的转移引发了踝节目的演化辐射，在澳洲以外的陆地上，生成了新生代不同类别的草食性有蹄动物。故此最原始的踝节目其实是某些现代有蹄类的共同祖先。虽然有些踝节目有细小的蹄，但最原始的形态是有爪的。

最近的分子及DNA研究重整了哺乳动物的演化情况。近蹄类及管齿目不再是奇蹄目、偶蹄目及鲸目的近亲，故有蹄类最少是从两个不同的分支独立演化而成的。这亦有可能由于踝节目本身是一个多系群，即踝节目内的成员未必是近亲。

Condylarthra is an informal group – previously considered an order – of extinct placental mammals, known primarily from the Paleocene and Eocene epochs. They are considered early, primitive ungulates. It is now largely considered to be a wastebasket taxon, having served as a dumping ground for classifying ungulates which had not been clearly established as part of either Perissodactyla or Cetartiodactyla, being composed thus of several unrelated lineages.