The initiative was undertaken by the NGO International Sarab Kamboj Sabha, which had been demanding the installation of the statue for four decades.
The marble statue of Udham Singh, in a portrait of taking a pledge to avenge the Jallianwala Bagh massacre, was installed on Monday at the main entrance.
The statue is said to be prepared in Rajasthan at a cost of Rs 10 lakh.
The Central government has already announced a slew of programmes to commemorate the centenary of the massacre next year.
A statue of the martyr in a charging position while holding a pistol is installed outside the Hall Gate in the city but the long-pending demand to install another one at the iconic Bagh was fulfilled on Tuesday.
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