Objective: We investigated the effects of different intensities of sinusoidal magnetic fields of daily life exposures on the peripheral nerve regeneration daily life exposure. The effects of magnetic field (50 Hz frequency and 1, 2, 3 mT intensities) treatment on sciatic nerve regeneration were studied in a model of crush injury of the sciatic nerve of rats. Material and Methods: Prior to crush injury, compound muscle action potentials were recorded for all rats. Then, the sciatic nerve was compressed for 15 sec with a jewelers forceps (no: 5). One rat group was kept as control and the remaining were assigned as 1, 2 and 3 mT magnetic field treatment groups. The magnetic fields 1, 2 and 3 mT were applied to 30 rats for 4 hours per day for a week using Helmholtz coil systems. The control group was included in the system for 4 hours per day for a week while the system was turned off. Results: In terms of nerve regeneration, 3- and 7-days treatments of different magnetic field intensities had no statistically significant effect on amplitude and conduction velocity of compound muscle action potential. Conclusions: The intensities and frequency of magnetic fields used in this study had no effect on conduction and excitability of nerves and consequently did not influence the nerve regeneration. We could not prove a neuroprotective effect of magnetic field in rat crush injury model using electrophysiological method.