The aim of this study was to translate into Spanish and validate the Boredom Proneness Scale-Short (SBPS) in a sample of young people and adults in Peru during the COVID-19 pandemic. A total of 588 people between 17 and 53 years of age (M = 21.70; SD = 5.22) was selected as a sample. The methodology used combined Confirmatory Factor Analysis (CFA) and Item Response Theory (IRT) to determine the internal structure, factor weights and reliability, which was estimated by means of the omega coefficient test information functioning and empirical or marginal reliability. Evidence of convergent validity of the SBPS was explored based on its relationship with the Generalized Anxiety Disorder Scale (GAD-2) and Patient Health Questionnaire (PHQ-2). Results reveal that the SBPS is a measure that should be interpreted uni-dimensionally. Reliability was excellent and convergence with the GAD-2 and PHQ-2 presented the expected relationship in both magnitude and direction.