the objective of this study was to assess in households of bucaramanga, the factorial validity, internal consistency and reproducibility of the scale of perception of food security (epsa) applied in the survey of the nutritional situation in colombia (ensin-2005). during the first semester of 2007, a questionnaire with so-cioeconomic variables was applied in 108 household and, with interval of one month, epsa was applied twice. factor analysis and goodness of fit of the final model and the theoretical one were evaluated. we established the reproducibility of the epsa and its internal consistency. we ratified a dimension with two components; ilack of money to buy foodsi and iexperience of hunger for lack offoods.i this model is similar to the one applied in the ensin-2005, explains 76% of the variance and its adjustment was barely acceptable: rmsea 0.27, nfi 0.63, gfi 0.58. the reproducibility was almost perfect (r= 0.98, ci; 0.98 - 0.99) and had internal validity, alpha of cronbach 0.92.