The aim of this study was to further explore the relationship between vocational interests, intelligence and academic achievement. Furthermore it was a main point of interest how empirical results, which had been found so far, could be transfered to pupils of a „Hauptschule“ and to a questionnaire for vocational interests, which had been designed in two diploma theses (Sulzbacher, 2006; Shirazian, 2008). Thererfore, 116 male and female pupils of the 8th grade within the age of 13 and 15 were tested at three Styrian schools. In addition to the professional interest test verbal, numeric and spatial ability, memory and academic achievement in German, Maths and English were raised. Expected sex differences in each orientation of interest could be confirmed, except „research“. Girls had higher interests in the areas of „office”, „social”, „creative”, „fashion/appearance” and „nutrition/nature”. Boys are more interested in the fields of „EPD” and „craft”. Results indicate that there are a positive relations between the vocational interests: „office”, „research“, „social”, „creative” and cognitive abilities and academic achievement and a negative relation tot he scale „craft”. Multiple regression analyzes gender-differentiated with the interest orientations as a criterion provided up to 25% of variance by the predictors intelligence and academic achievement.