A mini review of enzyme-based electrochemical biosensors for inhibition analysis of organophosphorous and carbamate pesticides is presented. Discussion includes the most recent literature to present advances in detection limits, selectivity and real sample analysis. Recent reviews on the monitoring of pesticides and their residues suggest that the classical analytical techniques of gas and liquid chromatography are the most widely used methods of detection1.2. These techniques, although very accurate in their determinations, can be quite time consuming and expensive and usually require extensive sample clean up and pre-concentration. For these and many other reasons, the classical techniques are very difficult to adapt for field use.