Seyyed Mohammad Hojjat Kooh Kamari (Persian: سید محمد حجت کوه‌کمری) was a contemporary Iranian Muslim Faqīh and a Twelver Marja' who was in charge of the administration of the Qom Seminary for ten years. He was born on 17 March 1893 and died on 19 January 1953. He was a prominent student of Abdul-Karim Haeri Yazdi and after him held the position of Shia authority.
 Seyyed Mohammad Hojjat Kooh Kamari was born on 17 March 1893 in Tabriz, Iran. His family was a religious family and his father, Seyyed Ali Kooh Kamari Tabrizi, was one of the mujtahids of Tabriz. His lineage is from Sayyids of Kooh Kamar in Zonuzaq Rural District, Marand County, East Azerbaijan Province, Iran and goes back to Ali ibn Husayn Zayn al-Abidin.
 Seyyed Mohammad Hojjat Kooh Kamari studied literature, mathematics, ancient medicine and some new sciences in Tabriz, Iran. He learned most of the basic courses of Islamic jurisprudence and principles from his father there and also taught for some time. In 1912, he went to Najaf, Iraq to continue his education after taking basic seminary courses from his father. 
 In Najaf, he learned Islamic jurisprudence, Principles of Islamic jurisprudence, Hadith studies and Biographical evaluation from the masters of Najaf seminary, including Mohammed Kazem Yazdi, Fethullah Qa'ravi Isfahani and Agha Zia ol Din Araghi. He also studied astronomy there. Hojjat fell ill during his studies in Najaf and returned to Tabriz on the advice of his father, but after a while he went to Najaf again and in addition to continuing his education, he also taught.
 In 1930, he returned to Iran and settled in Qom and began teaching in the Qom Seminary. His eloquence and mastery in teaching and his surroundings on the opinions and sources of Islamic jurisprudence attracted many students to his study circle. In 1945, he started the foundation of Hojjatieh school in Qom.
 After the deaths of Abu l-Hasan al-Isfahani in 1947 and Seyyed Hossein Tabatabaei Qomi in 1948, he became a Shia authority; And millions followed him in religious rulings.
 He had authority of Hadith studies from some of his masters, including his father, Agha Zia ol Din Araghi, Shariat Isfahani, Seyyed Abutorab Khansari, Abdullah Mamaqani, Seyyed Hassan Sadr, Mohammad Baqer Birjandi, Abdul-Karim Haeri Yazdi and Mohammad Hossein Kashif al-Ghatta. He also received a certificate of Ijtihad from Muhammad Hossein Naini, Agha Zia ol Din Araghi and some of his other teachers.
 Seyyed Mohammad Hojjat Kooh Kamari has many writings in Hadith studies, Fiqh, Principles of Islamic jurisprudence and Biographical evaluation.
 His most important hadith works are:
 His important jurisprudential works are:
 He also published notes on some Fatwa books, including:
 He has written the following books on the principles of Islamic jurisprudence:
 The Biographical evaluation book of him is:
 According to Shahab ud-Din Mar'ashi Najafi, some of Seyyed Mohammad Hojjat Kooh Kamari's writings, were in his library in his own handwriting and have not been published.
 Due to his years of education in the Hawza Najaf and the Qom Seminary, he was able to raise many outstanding students. Some of them are:
 Seyyed Mohammad Hojjat Kooh Kamari, after a period of serious illness, died on 19 January 1953 at the age of 62 in Qom and was buried in a room next to the mosque of the Hojjatieh School.
 The commemoration of Seyyed Mohammad Hojjat Kooh Kamari was held in February 2018 by the Qom Seminary.