In the final paper titled "Estimation of measurement uncertainties in the method of measuring small resistance", it’s referred to various methods of measuring small resistances. The theoretical background and the significance of small resistance measurements are laid. Tests are conducted in laboratories for purpose of solving effects of low resistances in the measurements. The true value of resistance is taken from the result obtained with a high-accuracy digital instrument. Based on the various low resistance measurement methods, laboratory measurements of low resistance values are performed in three different ways: U-I method, comparative method and Thomson’s bridge. The measurement resistance value is 0.1Ω, 1Ω and 10Ω. Based on the measured size, the measurement uncertainty measurement is performed. The estimation of measurement uncertainty of the U-I measuring method of small resistances is higher in case of current measurement than voltage and for resistance value of 10Ω is 0.86%. Comparative method has greater fault when measuring Ux voltages for maximum resistance value of 1Ω, 0.87%. Measurement uncertainty at measuring voltage Un of all resistance values is estimated at 0.5%.