Akhil Bharatiya Hindu Mahasabha (lit. 'All-India Hindu Grand Assembly'), simply known as Hindu Mahasabha, is a Hindutva political party in India.
Founded in 1915 by Madan Mohan Malviya, the Mahasabha functioned mainly as a pressure group advocating the interests of Orthodox Hindus before the British Raj from within the Indian National Congress. In the 1930s, it emerged as a distinct party under the leadership of Vinayak Damodar Savarkar, who developed the concept of Hindutva (lit. 'Hinduness') and became a fierce opponent of the secular nationalism espoused by the Congress.