The aim of this study is to evaluate the size and morphologic patterns of the biceps muscle after coracoid transfer performed during the Bristow-Latarjet procedure to treat anterior shoulder instability. We analyzed retrospectively 26 patients, who underwent a Bristow-Latarjet procedure, and 23 volunteers (control group) with no shoulder disease. A US machine (ATL 5000 HDI, probe 4.2 MHz) was used to determine the biceps section area (BA) and biceps echogenicity (BE). The dominant and non-dominant limbs in both groups were compared. The coracoid transfer performed in the Bristow-Latarjet procedure to treat recurrent anterior shoulder instability does not modify the size and morphology of the biceps muscle.