In pre-school institutions one of the important task is to care about optimal growth and development of pre-school children. Therefore, the interest in studying the physical activity of preschool chldren and the child's nature of movement has been considerably increased in order to improve their kinantropological features. The aim of this paper is to investigate the influence of physical exercise in nature on the development of kinantropological of children. The study was conducted on a sample of 44 children (22 children comprised an experimental group and 22 children control group) of five years old in the kindergarten „Viškovo“. The body height and weight of the children were measured wich will be used for calculations of the body mass index. Initial and final measurements were carried out in the test of backward walking (coordinaton), transfering the cubes (coordination), lifting the core (repetitive troop strength), jumping distance from the spot (explosive force of the leg), running for 3 minutes (aerobic endurance) and pretension while seated (flexibility). An experimental group participated in physical exercise in the open air where they practiced 3 times a week for 45 minutes in a period of 3 months. The obtained results showed that there was no significant difference between the groups in the initial check and the first hypothesis was confirmed that both groups at the beginning of the program would have the same results in initial measurements. Furthermore, the results show that the experimental is better than the control in the final measurement, which is confirmed by another hypothesis that the final experiment group will have better results than the control group. The results also showed that there was a statistically significant difference between the initial and final measurement of the experimental group and thus confirmed a third hypothesis that said experimental group would progress more than the control. Given the results that did not show a statistically significant difference between the initial and final measurement of the control group, the fourth hypothesis was confirmed that the control group would not determine significant statistical progress between the initial and final measurements.