The vastness of cyberspace has taken up all aspects of human life, in a way that keeping aloof from this space is inconceivable for some people. Despite the undeniable benefits of cyberspace, unfortunately, since its advent, the misuse of this space has created many potential and actual risks. This research has been done by descriptive and analytical method, based on the available library resources, and its jurisprudential principles have been expressed by going through the releval sources and its nature and legal conditions are examined. The result of this research shows that assistance in cybercrime is one of the examples of involving in a sin or wrongdoing. So, its forbidness is proved by citing Quranic evidence, validity and the independent rule of reason on the ugliness of helping sin. Also, the introduction of religiously prohibited and the rule of harmlessness have been studied as other jurisprudential principles. Examples of the acompalice’s behavior in cyberspace, if a combination of legal, material and spiritual elements, is criminally liable. Of course, assisting in cybercrime is sometimes independent of the main act; such as pornography, in which the legislature, while emphasizing the importance of maintaining public decency and protecting the privacy of society in two articles of Penal Code, has considered pornography as an independent crime and is sometimes subject to the main act, such as crimes against privacy, accuracy and integrity of data and systems, computers and telecommunications, etc., which can be punished according to the conditions set forth in Article 127 of the Islamic Penal Code.