Neuroticism is a personality factor that encompasses four subfactors: depression, vulnerability, passivity and emotional instability. This research aimed to build and search for evidence of validity of implicit measures to assess the facets of neuroticism. For this purpose, two studies were conducted: (1) elaboration of the items; (2) empirical test of the measures. The first study consisted of an empirical procedure to select items and search for evidence of validity based on the content of the built measures. Participants were 408 people, all of them were university students. This procedure resulted in lists of representative words of the individual and the facets of neuroticism. On the second study, the previously chosen words were implemented on implicit association tests, so that more evidence of validity was sought and reliability indicators were obtained. Participants were 417 people with different levels of educational background, 72.2 percent of them had incomplete higher educational background and 61.4 percent were women. The results indicated that the measures of depression, insecurity and passivity presented satisfactory evidence of validity, including a structure aligned with the definition of the constructs and expected relations to other variables. For instance, we found positive correlations between the built measures and neuroticism and negative correlations with satisfaction with life. The measure of emotional instability, however, proved to be more problematic regarding the evidence of validity. In addition, the internal consistency indexes for all measures were found to be adequate and the test-retest correlation coefficients were higher than the values found in previous studies. It is argued, however, that more evidence of validity is needed so that these measures can be used in applied contexts.