Among the sesamoid bones of the human body is fabela, a bone associated with the tendon of the lateral head of the gastrocnemius muscle. The objective of the present study was to locate this bone, either unilateral or bilateral, in relation to gender and age groups, in addition to recording its length and width. A sample of radiographs of 200 people, of both sexes, 44 male and 156 female, whose ages ranged from 10 to 90 years were used. Of the total cases (200 people), the presence of fabela was observed in 75 (37.5%), of which 9 (12%) were male and 66 (88%) female. Their greatest presence was observed in people aged between 51 and 60 years, in which they occurred in 25 cases (18 females) and between 61 and 70 years with 29 cases (27 females). The data obtained will complement the morphological knowledge about this sesamoid bone in the Chilean population.