<p>The aim of this paper is analyzing the structural validity and invariance of the reactive / proactive aggression questionnaire (RPQ) in offenders and non-offenders adolescents. To this end, 344 male adolescents from Metropolitan Lima were intentionally selected, whose ages are between 15 and 17 years (<em>M</em> <sub>age</sub> = 16.055, <em>SD</em> <sub>age</sub> = 0.674), of which 51.16% were offenders. The results show that the two-dimensional model of the RPQ presents adequate fit indices (SB-χ2 = 461.463 <sub>(229)</sub>, CFI = .914, RMSEA = .054 [.047-.062]). In addition, the configurational, metric, scalar and strict invariance was established in both groups. Adequate omega coefficients are reported for Reactive Aggression (ω = .797) and Proactive Aggression (ω = .837). It is concluded that the RPQ is a two-dimensional, parsimonious, and interpretable measure that measures without bias reactive and proactive aggression in institutionalized and non-institutionalized adolescents.</p>