Background: Two Dimensional Electrophoresis (2DE) is the most commonly and useful separation technique in proteomics. Each proteome snapshot becomes a protein profile. By means of this technique, several proteins are studied simultaneously. Methods: In this study, by use of (2DE) method, the differences of two profiles of Buthidae endemic scorpions, A.Crassicauda known as "black scorpion" and "O. doriae" yellow scorpion", were investigated. Results: For A.Crassicauda scorpion there were about 20 spots (peptides) in 6.2 - 8.2 pH ranges and molecular weight was less than 3 to 14 kDa and O. doriae scorpion 30 peptides, in 6.3 - 8.5 pH ranges, 1 to 45 kDa that fractionated and identified. Conclusion: By this method, the field of bioinformative data bank from Iranian endemic scorpionschr('39') venom could be prepared. By making change of any effective factors on scorpion venom, considerable results due to influence of the factor on determining kind of venom can be achieved and studied.