The purpose of the study was to describe the appearance of the triangular fibrocartilage (TFC) on high resolution ultrasound (HRUS). HRUS was performed on the wrist joint in 53 wrists of 35 patients (age range: 18-72 years, mean: 36.8 years). Chronic pain was detected in 35 wrists and 18 were asymptomatic. Multicompartment injection wrist arthrography indicated normal TFCs in all the wrists. TFC of the wrist appeared as an inverse triangular structure with homogeneous hyperechogenicity in transverse and oblique sagittal scan at the level of the distal radio-ulnar joint. The measurements range from 2.3 mm to 4.2 mm (mean value 3±0.39 mm) in the oblique sagittal scan and from 2.4 mm to 3.8 mm (mean value 3.09±0.33 mm) in transverse scan. An analysis of the patients' age, sex and left or right hand yielded no statistical significance. In normal conditions, the TFC is thicker than 2.5 mm in transverse and oblique sagittal section with a confidence level of 95%. The TFC can be accurately and reliably displayed on HRUS as a homogeneous hyperechoic inverted triangular structure in normal subjects.