Thanathorn Juangroongruangkit, chairman of the Progressive Movement, is to stand trial in the Criminal Court for lese majeste.
The charge stems from comments he made on Facebook Live on Jan 18, 2021, in which he criticised the government's Covid-19 vaccine procurement plan.
His lawyer, Krisadang Nutcharat, said prosecutors indicted Mr Thanathorn in the Criminal Court yesterday for breaching Section 112 -- the lese majeste law -- of the Criminal Code and the Computer Crimes Act, following a probe by Nang Loeng police into his Facebook remarks.
The Criminal Court accepted the case for trial, Mr Krisadang said.
The Progressive Movement later said Mr Thanathorn had been indicted for referring to His Majesty the King while talking about the government's procurement of a Covid-19 vaccine from Siam Bioscience Company, a biopharmaceuticals manufacturer owned by His Majesty.
The indictment says Mr Thanathorn's remark was intended to make the public look upon the King with suspicion and was against the law.
Mr Thanathorn was granted later bail.