Al-Qur’an is the text that contains i’jāz. However, there are disagreements about i’jāz criteria. Some people think that i’jāz is outside the text, while others assume i’jāz is in the Qur’an itself. One of the scholars who agreed that i’jāz al-Qur'an is in the text of the Qur’an is Abd al-Qāhir al-Jurjānī. However, al-Jurjānī’s explanation explaining this problem is still widely misunderstood and sometimes directs understanding of the irrational aspects. This study aims to find the reasoning i’jāz al-Qur’an according to al-Jurjānī by using the linguistic relativity approach. This study found that the problem of i’jāz al-Qur’an according to al-Jurjānī lies in the aspect of the language structure (al-naẓm) which covers the whole concept contained in the language convention. With the form of i’jāz in the form of this language allows the inability of other people to make the same thing that becomes the sign i’jāz can be explained through the concept of language relativity. Therefore, al-Qur’an as when Allah made it has a special reality that excels every human language.