Digital technologies are promoting various transformations in society, but in education these tools did not re-signify pedagogical practices. This study understands digital technologies as cultural artifacts immersed in our habits, customs and beliefs. The research aims to understand the perspective of teachers on digital technologies from a dip in their pedagogical beliefs, in particular the belief of teacher computational self-efficacy. The quantitative and qualitative study was developed in two parts: interviews of 64 teachers in 8 public elementary schools of the Municipality of Rio de Janeiro, between 2014-2016. And in 2018 two focus groups took place in two schools selected to continue the study because teachers presented perceptions of the near-technology of cultural artifact. The results of the interviews showed that most of the teachers (63) use the technologies in the personal scope, but when we verified the school environment this group decreased to 47. And only 17 of these managed to modify their pedagogical practices using the TIC. Direct experience was the most relevant source of self-efficacy information. In the analysis of focus groups, again direct experience stands out, along with social persuasion and concern with the student (contextual variable). At the end of the study it is noticed that the teacher s computational self-efficacy does not represent a continuous trust, on the contrary it is influenced by other factors and therefore is in constant transformation. For future research, the deepening of the knowledge about the beliefs of self-efficacy with a focus on the TIC is essential, mainly, its relation with other unknowns.