Primary reflexes play a crucial role in the earlier month of a child's life. However in the course of the development of the nervous system these reflexes are gradually inhibited or transformed. The persistence of primary reflexes after one year of life may disrupt the development of sensory perception.The aim of this study was to determine the occurrence of the persistent primary reflexes: the asymmetrical tonic neck reflex and the tonic labyrinth reflex in school age children in different classes and to establish the relationship between persistent primary reflexes and the occurrence of symptoms of specific learning disorders. We had a total of 175 children at the age of 6 to 11 from different classes were involved in this study. To find the occurrence of persistent the asymmetrical tonic neck reflex (ATNR) and the tonic labyrinth reflexes (TLR) standardised tests were used. To compare the results of our research and possible difficulties at school skills, we conducted unstructured interviews. For statistical purposes, frequency analysis and test of independence ch2 in contingency table were used. The results revealed the occurrence of persisted TLR in 47 % of tested children. Concerning ATNR the data showed almost the same level of persisted reflex in right (33%) and left (34%) side of the body. The highest number of TLR was found in children in 1st class – 55%. In 2nd class the number of persisted reflexes lowers to 40%. The continued decrease of this indicator is registered in children in 3rd year – 31%, whereas in children in 4th year the results indicate a slight rise in occurrence of TLR to 33%. Regarding ATNR, there is no difference between right and left side in children in 1st (39%), 2nd (40%) and 4th (17%) years of studies. The biggest diversity between right and left side we can see in 3rd year - 31% left and 19% right side. Ch2 test confirmed the hypothesis about relationship between TLR x ATNR-R and ATNR L x ATNR-P.