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The present study complements elements previously published (Veiga & Moura, 1999) about Melgosa’s (1987) Occupational Identity Scale (OIS), now adapted to the Portuguese population. The sample consisted of 547 7th-11th grade students of both sexes. The scale’s psychometric study included the factorial analysis of its main components with varimax rotation — which revealed four specific factors (diffusion, foreclosure, moratorium, achievement) — and establishing reliability coefficients for different groups of students. Several relevant statistical elements are presented, such as the mean and standard deviation for different groups (school grade and sex). External validity, assessed through the relation between the results obtained on the Occupational Identity Scale and the scores obtained on the Dellas Identity Status Inventory Occupation Scale (previously adapted to Portugal) (Taveira & Campos, 1987), revealed high correlations. The elements presented were consistent with those of the original version, corroborate the elements of the previously mentioned work and highlight, now in broader and consistent manner, the qualities of the OIS scale in different subject groups, as well as its utility for research and for educational intervention.