The Thai rank of Field Marshal is the most senior rank of the Royal Thai Army. The rank was formally created in 1888 together with all other ranks of the military by King Chulalongkorn (Rama V), who wanted to modernize his armed forces along Western lines. There have been 13 appointments to this rank. The rank has not been awarded since 1992 and its abolition has been proposed by the Thai government in 2018. Plaek Phibunsongkhram was the first commoner to hold this rank. The Royal Thai Navy equivalent is known as Chom Phon Ruea ('Admiral of the Fleet') and Chom Phon Akat ('Marshal of the Royal Thai Air Force') for the Royal Thai Air Force.

List of field marshals