Tomographic methods are often used to solve the geophysical inversion problem. This is the problem of determining the characteristics of an underground region by using measurement data. With a tomographic method, the pictures of the physical properties in the region between pairs of boreholes can be reconstructed. In this paper, we apply genetic algorithms to cross-hole seismic line-integral data. These data can be generated by the transmission problem through the cross-hole region using seismic energy. Some test-examples for measuring the performance of the applied genetic algorithms are presented. The obtained results are promising.