Soon after the House assembled, speaker Sumitra Mahajan adjourned the House for nearly 40 minutes following stormy Opposition protests and the members started leaving the Chamber.
Suddenly, an Opposition member, who had earlier trooped into the Well, pointed out that security personnel in the Visitors' Gallery were grappling with a person whose right foot was hanging from the wooden fence.
Sources said that the man named Rakesh Singh Baghel of Uttar Pradesh, also tried to shout slogans in the House but could not succeed in doing so.
He was caught and lifted up by about 4-5 alert personnel.
Baghel is now being questioned at the Parliament Street police station.
Baghel had visited the Lower House on the reference of Bulandshahr MP Bhola Singh.
It then transpired that the man had tried to jump into the Lok Sabha Chamber. The man was caught and then bundled out.
The other visitors were then guided out of the gallery which is right opposite the press enclosure.
Delhi Police personnel in plain clothes are usually seated in the front rows of the Visitors' Gallery to prevent such incidents.
While the Speaker had left, the Prime Minister was not in the House. Senior ministers including Arun Jaitley and leaders like Mulayam Singh Yadav were in the House when the incident took place.
The speaker has taken a cognizance of the incident and will talk to the Parliament security officers regarding the same.
(With inputs from agencies)