This study aims at translating and validating the content of the instrument Conditions of Work Effectiveness - Questionnaire-II (CWEQ-II), developed by Laschinger, Finegan, Shamian and Wilk, modified from the original CWEQ for the Brazilian culture. The methodological procedure consisted of the stages of translation of the instrument into the Portuguese language; back-translation; semantic, idiomatic and cultural equivalence and tests of the final version. The instrument in the Portuguese version was applied to a group of 40 nurses in two hospitals. The data resulted in a Cronbach’s Alpha of 0.86 for the first hospital and 0.88 for the second one. The results of the factorial analysis are considered sufficiently satisfactory. It is to conclude that the instrument can be used in Brazil.