Background The control of body posture is based on the integration of polisensoric stimuli and conscious body image. Previous studies on the influence of vestibular functioning on postural disturbances have been inconclusive. The purpose of this paper was to investigate the effect of vestibular input on the body posture. Material and methods We examined 65 healthy children (40 girls, 25 boys) at school age 7-12 years. Children were assessed using Kasperczyk Visual-point Method and Southern California Postrotary Nystagmus Test. Statistical analysis was carried out using Statistica software. Mann-Whitney U test and Spearman test were used to determine dependency between quantitative and qualitative characteristics. A p<0.05 was considered statistically significant. Results The greatest number of postural deviations was observed in the setting of the head (100%) and shoulders (72%). The median Southern California Postrotary Nystagmus Test score corresponded to the published standards. There was a significant association between lumbar hyperlordosis and the results of postrotatory nystagmus following rotation to the right (p=0.033). Conclusions The fact that there was a significant association between an increased lumbar lordosis and postrotary nystagmus might indicate that the assessment and treatment of postural abnormalities should consider vestibular system examination. This study confirmed that a slight imbalance in the activity of vestibular might lead to postural disturbances.