阔筋膜张肌（tensor fasciae latae），股部（又叫大腿）的深筋膜较为发达，特称阔筋膜。阔筋膜外侧特别厚，形成一条扁袋状结构，叫骼胫束。其位于股部外侧面，上端附于骼嵴前部，下端止于胫骨外侧踝。而骼胫束上份又分为浅深两层，之间包住一块肌，就是阔筋膜张肌。此肌上端起于骼前上棘，下端移行于骼胫束，它收缩时紧张骼胫束，并可屈髋关节。同时其也是临床常选用的骼胫束瓣或肌皮瓣的供体。

The tensor fasciae latae (or tensor fasciæ latæ) (/ˈtɛnsər ˈfæʃi.iː ˈleɪtiː/) is a muscle of the thigh. It is related with the gluteus maximus in function and structure and is continuous with the iliotibial tract, which attaches to the tibia. The muscle assists in keeping the balance of the pelvis while standing, walking, or running.