Since the problem of official corruption is becoming more severe of so many stimulating factors such as lenient law enforcement, out-of-date legal measure and an increasing number of the offenders who are establishing organized crimes. Moreover, the criminals' activities are covert and concealed from the law enforcement perception. These factors render the governing legal measure to be inefficient therefore it is necessary to introduce a new legal measure that enables incrimination the offense at the conspiracy stage to prevent the problem. Criterion against conspiracy of the offense is one of common law criteria which aim to incriminate the activities when there is an "Agreement" intending to commit the offense with "a conscious union of wills for a common undertaking" regardless of whether the agreed offense is actually committed or not because of the need to interrupt the activities at the "early stage" of he whole offense and discourage a person from committing or participating the commission of the agreed offense, hence this criterion induces prevention and suppression official corruption to be more efficiently implemented such as to overcome the impotence of prosecution the master mind or difficulty of evidence collection to prosecute the offenders etc. Thailand has been introducing the criterion against conspiracy of the offense only for prevention and suppression of some particular offenses such as for prevention and suppression of narcotic offense, trafficking of children and women, money laundering and abuse of governmental procurement. Seemingly, the liability for conspiracy facilitates the incrimination of criminals whom is normally hard to prosecute and provides that the act of agreeing between two or more persons for commission of the offenses is a punishable crime without element of actual commission of the offense. This thesis is a study of the criterion against conspiracy of the offense and suggests some models to solve the problem by introducing the criterion against conspiracy of the offense to prevent and suppress the crime of official corruption under the organic law of counter corruption B.E. 2542 for precaution against and solution to the problem are implemented totally and efficiently as much as possible.
