This study aimed to examine the validity of the Brazilian-Portuguese version of the Parental Burnout Assessment (PBA), the current gold-standard measure of parental burnout (PB). We surveyed parents in Portugal (N = 407) and Brazil (N = 301). We (a) compared the factor structure of the Brazilian-Portuguese version with the original structure of the PBA, (b) tested the adequacy of a second-order factor structure, (c) evaluated invariance across gender and countries, (d) examined reliability, and (e) evaluated whether PB levels are related to gender, satisfaction with life, and parental self-efficacy (PSE). Results provided evidence for the validity of the Brazilian-Portuguese PBA and its four facets. Factor models supported the use of both individual facet scores and a global PB score. The structures tested were invariant across countries and gender, and all factors had good reliability. Relations with PSE, life satisfaction, and gender provided initial evidence for validity, and suggested a possible influence of intensive motherhood models.