The aim of this study was to evaluate the dental status in 6 years old school children in Iași in correlation with behavioral factors and socio-economic status. Material and method. A longitudinal epidemiological study was initiated within the project “Evaluation of oral health and education for oral health in 6 and 12 year-old school-children in Iași, Romania” including 592 school children aged 6 from 21 schools in Iași. For oral health assessment EGOHID system was used. Results. The values for dmft /dmfs were 3,64 and 6,85 respectively. The prevalence of dental caries was 78,6% for d1-6mf and 67,9% for d3-6mf. The values for decayed teeth and surfaces was significantly higher than those for filled teeth and surfaces. A positive correlations between dmft index and the socio-economic level and between dmft index and sugar intake were established. 57,9% of subjects eat sweets between meals. More than half of children (56.3%) brush their teeth twice a day and 15% of them cleen their teeth occasionaly.Conclusions. Intensive preventive efforts by risk factors control are needed in order to decrease the high found prevalence of dental caries.