The probe was prompted by a recent warning to the publication by the National Council for Peace and Order.
National Press Council of Thailand president Chakkrish Permpool wrote on his Facebook page on Saturday the professional body will meet tomorrow and launch a probe into the ethical conduct of Manager Weekly.
The NCPO issued an announcement last week asking the press council to probe the publication over several reports it ran which the military government alleged to be false.
The NCPO said the reports were intended to discredit the junta, but didn’t say what they were.
He said the council will announce its decision on the probe in due course, but is stumped for the time being as it does not know what prompted the complaint.
Jittinart Limthongkul, the CEO of Manager Media Group, called on the NCPO to specify which edition of the magazine or what reports contained false information so he could set up an internal inquiry.
Mr Jittinart said he could only assume the reports were about an assault scandal involving television actress Janie Thienphosuvan allegedly by her husband Chonsawat Asavahame; permission granted by the NCPO to allow former prime minister Yingluck Shinawatra to travel aboard to celebrate her elder’s brother Thaksin Shinawatra’s birthday in Paris; the interim constitution; the NCPO's order rescinding the sacking of former police chief Patcharawat Wongsuwon in 2009; or the arrest of former key red-shirt leader Col Apiwan Wiriyacha on a lese majeste charge.