Objectives: To explore to what extent are the children and adolescents capable of repeating the report of malocclusion impact using Malocclusion Impact Questionnaire (MIQ) and whether the changes are influenced by age and gender. Study design: Observational longitudinal study. Participants and methods: The sample consisted of 30 subjects, aged 10-17 who had agreed to participate and came for an orthodontic consulatation in Dental Health Center Osijek and Clinical Hospital Center Rijeka, as well as one Osijek elementary school students who had volunteered. The respondents self-administared MIQ twice in a one-week-interval when they were not exposed to the dental interventions (test-retest). Reproducibility of reporting scores was analyzed using the intraclass correlation coefficient and the Wilcoxon paired samples test. Spearman's correlation was used to analyze the relationship between age and repeatability, and the Mann-Whitney test was used to compare differences in MIQ reporting between genders. Results: There were significant differences in MIQ reporting between the two time intervals with a large effect size (p = 0,004; r = 0,520), but reproducibility was substantial r = 0,747 (95% Cl 0,521 – 0,873; p  0,001). One respondent had a large discrepancy in MIQ reporting (23 scalar points), while the median value of discreapancy was 1,5 (inerquartile range 1-3). Differences in MIQ reporting were independent of age (r = 0,168; p = 0,374) or gender. Females reported higher MIQ score than males, but statistically significant only at T0 with the moderate effect size (p = 0,043; r = 0,369). Conclusion: Children and adolescents have considerable reproducibility in reporting the impact of malocclusion with the MIQ instrument, and cases of poor reproducibility are isolated.