This study will be a single-blinded randomized clinical trial, comparing the application of non-ablative fractional erbium laser ProDeep 1340 nm and the technique of induction of neocollagenesis by microneedling. The primary objective of this study is to compare the effectiveness of treatment of atrophic acne scars on the face with non-ablative fractional erbium laser and microneedling. The secondary objectives are: assess the degree of satisfaction of participants with both techniques; check tolerability and incidence of adverse effects with both techniques; assess time needed for recovery and number of days absent from work or social activities after the procedures and evaluate the opinion and physical discomfort of each technique.