The functions of legislature for the protection of animal species have many challenges which not only disturbed the transparency of supportive laws of criminalization, but also created disturbances in judicial penal policy to determine the punishment for hunting and fishing. Therefore, the purpose of this study, which is descriptive and analytical using library resources, it illustrates the chaos in legislative and judicial penal policy in the criminalization and pass a sentence for hunters and fishermen. The findings of this study can be viewed in three cases. First, the species of animals in Iran, inspite of a good variety, are in poor condition. Second, Iran's legislative penal policy faces challenges such as non-criminalization on the basis of a single standard, the non-assignment of animal species, and the conflict of supportive laws. And third, judicial penal policy is also confused with recognizing a valid legal document.