The objective of this research was to study and compare sexual related offenses between Thai law and Islamic law (Sharia Law). This is because sexual related crime is one of the crimes that are gradually increasing in Thailand. Some people deem it is necessary for Thailand to increase the severity of penalty for this type of crime, besides the currently modes of penalty for this crime, which are imprisonment and fine. The only exception is for the case where the rape victim was murder, where the offender may face death penalty. Meanwhile, in some other countries or other systems of law, death penalty is an available option even the victim is not dead; one of which is of the Islamic Law. In the past, the fundamental concepts of this offence, both the concept of the offence and the theory for punishing, were closely similar because both evolved from religious-based concept. However, pertaining to revolutionary of idea, the offense and penalty for this type of crime of both law systems are now significantly different. Therefore, in order to increase the severity of Thai law’s penalty for this crime, the most important requirement is thorough understanding of law’s concept. This thesis focused on studying of the law evolution and the underlying philosophy for setting up penalty for sexual related offence, especially, penalty for rape and for sexual assault; as well as studying of foreign laws, in countries where Islamic Law are in effect in the present day. In order to gain an insight in the concept of Thailand, as well as to create new knowledge on sexual related offences, in accordance with Islamic Law
