A new method is described for investigating the distribution of the electric field in the human body subjected to high voltage. The electric field distribution is obtained from Laplace's equation. This method of analysis is based on the charge simulation method coupled with genetic algorithms to determine the appropriate arrangement, optimum number and radius of simulating ring charges inside the human body. The presented model for simulating electrical field is a three dimensional field problem. The results have been assessed through comparison with the magnitude of total induced charge and its distribution over the body surface, as estimated in other experimental and computational work. The accuracy of the simulation is satisfied for the potential error, (not more than 1 %), and the field deviation angle, (not more than 5 degree) over the human body.