Abstract: Solar energy is an abundant energy in the earth globe. Solar distillation is one of the techniques that uses this energy to obtain portable water from ground or salt water. The purpose of our experimental study is to show that the blocks of natural carbon, that is to say the remains of a fire, can serve as an element for improving the performance of a solar still. For this, two similar solar stills were used, one is taken as reference SSR and the other modified still SSM contains carbon block. The results show that there is an improvement rate of 8%.