The Qur'an is a direct miracle of the Prophet Muhammad and the main source in Islam. Therefore, the Qur'an needs to be kept seriously, not only in understanding and interpreting it, but also in knowing the history of its descent, the form of the letters, and how the letters are formed. Rasm Usmani is Rasm al-Qur'an which has been agreed upon by the companions of the Prophet and is used as a guide and reference standard for writing the Qur'an by Muslims until now. However, there are still many prints of the Qur’an that violate Rasm Usmani. from the background of problem above, this study aims to find out how the history of the writing of the Qur'an, the background of the emergence of Rasm Usmani and the rules for writing verses of the Qur'an in Rasm Usmani. This research is a literature study with a historical approach. The results showed that the writing of the Qur'an was the sunnah of the Prophet which was followed by ijmak (agreement) by all scholars, because the writing was in the form of tauqifiyyah which was carried out under the supervision of the Prophet. Rasm Usmani is the writing of the verses of the Qur'an which was used and approved by Caliph Usman when the process of writing the Qur'an was carried out. The Uthmani Rasm has been agreed upon by the scholars, so that the Rasm must be followed in its entirety by not adding or subtracting a single letter. Al-Qur’an merupakan mukjizat Nabi Muhammad saw. secara langsung dan  sumber utama dalam Islam. Karena itu al-Qur’an perlu dijaga secara sungguh-sungguh,  tidak hanya pada memahami dan menafsirkannya, tapi juga mengetahui sejarah turunnya, bentuk huruf-hurufnya, dan  bagaimana bentuk hurufnya. Rasm Usmani merupakan Rasm al-Qur’an yang telah disepakati sahabat Rasulullah serta dijadikan pedoman dan standar rujukan penulisan  al-Qur’an oleh kaum muslim sampai sekarang. Namun, masih terdapat banyak cetakan al-Qur’an yang menyalahi Rasm Usmani. Berangkat dari latar belakang masalah di atas, penelitian ini bertujuan untuk mengetahui bagaimana sejarah penulisan al-Qur’an, latar belakang munculnya Rasm Usmani serta kaidah-kaidah penulisan ayat-ayat al-Qur’an dalam Rasm Usmani. Penelitian ini bersifat kepustakaan dengan pendekatan historis. Hasil penelitian menunjukkan bahwa penulisan al-Qur’an adalah sunnah Rasulullah yang diikuti secara ijmak (sepakat) oleh seluruh ulama, karena penulisannya berbentuk  tauqifiyyah yang dilakukan di bawah pengawasan Nabi. Rasm Usmani merupakan penulisan ayat-ayat al-Qur’an yang digunakan dan disetujui oleh Khalifah Usman ketika proses penulisan al-Qur’an dilakukan. Rasm Usmani telah disepakati para ulama, sehingga rasm itu harus diikuti secara utuh dengan tidak menambah atau mengurangi satu hurufpun.