The four-time MP from Faridabad had only six months ago quit the Congress and joined the INLD ahead of Haryana Assembly elections.
Bhadana had met Prime Minister Narendra Modi yesterday, with whom he shares personal ties.
"Prime Minister Modi's thoughts and politics has always impressed me and I am joining the BJP to take forward his mission of making India strong and take the country forward by making it corruption-free and by uplifting the poor," he told PTI.
Lauding Modi's efforts, he said his actions have already led to uplifting the country's image in the eyes of the world and the youth and poor have their hopes pinned on the Prime Minister in their upliftment.
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He added that the BJP has accorded all respects to him and he would strive hard to strengthen the party and take Modi's mission forward.
The veteran Gujjar leader will also campaign for the BJP candidates in Delhi Assembly polls.
He was elected for the first time to Lok Sabha in 1991.