This study aimed to determine the factorial invariance by gender and the reliability of the Emotional Regulation Questionnaire (ERQ) in a sample of young Ecuadorians. A Measurement Equivalence or factorial invariance Instrumental study of the ERQ and its reliability was performed. Participants were 435 high school students (53.8% female), aged 14 to 20 (X=16.7, s=1.4). The ERQ's bifactor model was confirmed with χ2=145.4; df (68); p<.001; χ2/df= 2.1; GFI=.94; CFI=.91 & RMSEA=.05 [.03-.06]. The restrictions to the model in the measure equivalence show that it is invariant regarding gender. In addition, the reliability showed that the magnitudes are acceptable with ωSE=.636; ωRC=.762 in men and ωSE=.694; ωRC=.742 in women. The ERQ model was found to be invariant by gender and reliable.