"Arvind Kejriwal has got his desired (CM's) post. He has achieved this position by hijacking Anna Hazare's movement. He used Anna's anti-corruption movement to reach there," the yoga guru told reporters on the sidelines of a programme organised by Bhartiya Swabhiman Trust here.
"If he had to fight against corruption, he should have done that by remaining in the government set-up as IAS officer Ashok Khemka has done. Arvind Kejriwal had not done anything like Khemka, who has exposed corruption case against the son-in-law of Congress' leader while remaining in government service," Ramdev said.
He said Arvind Kejriwal preaches everyone to struggle for a corruption-free state, but he himself has taken the support of the "most corrupt party in the world" to become CM.
"If he had to take support, he should have taken the support of BJP and not the from the party against which he had launched an anti-corruption crusade," Ramdev said.
Asked about the BJP's silence when Arvind wrote a letter on this matter, Ramdev said he should have talked to the BJP leaders.
Earlier, he praised BJP's prime ministerial candidate Narendra Modi and said he would organise a rally in Delhi on January 5.
BJP leaders would share dais with him in the rally, he said, adding that he may extend support to Modi in rally after talking to them on some issues.