The main objective of this research was to identify the levels of sustainability practices and their institutionalization, aiming at a medium-sized packaging industry in the interior of Paraná. It is a quantitative research, with data collection through a structured questionnaire, with measurement of the questions by means of an interval scale of the Likert type of 5 points. The sample is composed of 244 valid questionnaires obtained in a non-probabilistic way and for convenience. The analyzes focused on the descriptive statistics (means and standard deviation), on the internal consistency of the constructs (Cronbach's alpha) and on the verification of the existence of differences between the means (Test t and ANOVA). The results pointed out that the economic dimension is the most perceptible by the employees, and must be worked together with the other dimensions. In the process of institutionalization the lower averages were in the sedimentation phase. It can be inferred that practices are not yet consolidated in the organization in order to reach all its employees. In this way, it is understood that the organization is in the process of habitualization and in the pre-sustainability phase, since it exercises some practices in isolation, without interconnection between the dimensions of sustainability. Individual characteristics, such as gender, schooling and length of time in the company do not significantly affect averages.