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Normative studies of the International Affective Picture System (IAPS) have been developed in several countries, observing culturally determined differences, which seem to vary by age group and gender. Brazil has normative data for the seniors and adults; however, pediatric studies are scarce. The objective of the study was to obtain the category ratings for valence and arousal of a set of these images for Brazilian teenagers and check whether its ratings are gender related. In the study, 161 teenagers, aged 12–18 years, categorized valence and arousal dimensions of 180 pictures from the IAPS through the Self-Assessment Manikin instrument. The comparison between genders showed differences in this classification. Teenage girls attributed more valence and less arousal to pleasant images and less valence and more arousal when facing unpleasant figures compared with teenage boys. In addition, both genders expressed their emotions in different intensities but were similar in categorizing this emotionality (as pleasant, unpleasant, or neutral). The IAPS proved to be an effective tool for assessing emotional reactions because the general categorization followed an equivalent pattern observed in previous studies and validated a set of IAPS images for use properly in Brazilian teenagers.