Adi Granth (or Aad Granth, literally "the FIRST/Beginning scripture" - as in the Mool Mantar; "Aad Sach, Jug Aad Sach", True in the Beginning, True for All time) is the early compilation of the Sikh Scriptures by Sri Guru Arjan Dev Ji, the fifth Sikh Guru, in 1604. This Granth ("collection of bani") is the Holy Scripture of the Sikhs. The tenth Sikh Guru, Guru Gobind Singh added further holy Shabads to this Granth during the period 1704 to 1706. Then in 1708, before his death, Guru Gobind Singh affirmed the Adi Granth as the perpetual Guru of the Sikhs and the Granth then became known as the Sri Guru Granth Sahib.

The original copy of the scripture, called Adi Granth, compiled and authenticated by Guru Arjan Dev still exists today and is kept at Kartarpur which is a town about 15 km. north west of the city of Jalandhar, Punjab, India. It contains the hymns of both Hindu and Muslim saints.

One of the classic simplifications of Sikh history pertains to the preparation of the sacred scripture, the Guru Granth Sahib. The event is generally described in the briefest terms. The Holy Volume was compiled by Guru Arjan (AD 1563-1606) and the first copy was calligraphed by Bhai Gurdas at his dictation — this is all we learn from most of the sources. What amount of planning, minute attention to detail and went into this work is slurred over.