In this thesis we present the measurements of resistance, magnetoresistance and Hall effect of the anisotropic organic conductors (TMTTF)2ReO4 and α-(BEDT−TTF)2I3 ˙ Measurements were conducted in temperature range from 140 K i.e. 60 K respectively, to room temperature and in magnetic fields to 5 T. The results of (TMTTF)2ReO4 resistivity show the expected behavior with two visible phase transitions caused by anion ordering at lower, and charge ordering at higher temperatures. The temperature dependence of Hall constants is compared with the measured temperature dependence of resistance. We use the simplest, classical theoretical model which relates the ratio of measured dependencies with changes in difference between hole and electron mobilities (μh − μe), and also the values of magnetoresistance with product of mobilities (μhμe). Theoretical expressions derived in this work show the connection between Hall constant, resistance and magnetoresistance and also enable the calculation of charge carriers mobility and concentration which differs from standard estimate for three orders of magnitude. Measurement results of α- (BEDT−TTF)2I3 resistivity show the expected behavior with metal-insulator phase transition. The temperature dependence of Hall constants is compared with the temperature dependence of resistance and we found that they are approximatly proportional. For temperatures above the phase transition, values of Hall constants, and thereby also carrier concentrations are in very good agreement with the theoretically predicted values for metallic phase, obtained from the values of crystal lattice parameters. The same theoretical predictions also proved to be relatively good for (TMTTF)2ReO4. We found sign change of Hall constant in α-(BEDT−TTF)2I3 under phase transition temperature, indicating the higher electron mobility versus hole mobility in insulator phase.