Hanuman Mandir, also known as Pracheen Hanuman Mandir, is a historic Hindu temple located in Connaught Place, New Delhi. This ancient temple is dedicated to Lord Hanuman and is believed to date back to the Mahabharata era. It is one of the five temples from that period in Delhi, along with Kalkaji, Yogmaya Temple, Bhairav Temple, and Nili Chatri Mahadev.

The temple is renowned for its unique architectural feature—a crescent moon on the spire (Shikhara) instead of the traditional Hindu symbol of Aum or Sun. This distinctive feature became particularly significant during the Mughal period.

The idol of Lord Hanuman in the temple is worshipped as "Sri Hanuman Ji Maharaj" and is depicted as Bala Hanuman, or Hanuman as a child. The temple is also famous for the continuous chanting of the mantra "Sri Ram, Jai Ram, Jai Jai Ram," which has been going on since August 1, 1964, and is recorded in the Guinness Book of World Records.