— Reproducibility of body fat (BF) and fat-free mass (FFM) measurements obtained by two indirect methods (bioimpedance analysis (BIA) and ultrasound scanning (US)) was performed in a group of young adults. To evaluate reproducibility, the repeated body composition measurements obtained using an ABC-02 Medas bioimpedance analyzer and BodyMetrix TM ultrasound scanner were carried out in the group of adult men and women. The study indicates the reliability of both individual and group estimates, as well as high reproducibility of measurements obtained with BIA and US. Strong positive significant correlations were found between the body composition measurements obtained with an ABC-02 Medas and BodyMetrix TM , as well as between repeated measurements of each of the devices. The analysis carried out for the ABC-02 Medas and BodyMetrix TM devices indicates good reproducibility of BF and FFM measurements in young men and women. The highest reproducibility was shown for the results of FFM measurements.