The collection of Sarcophagidae made by the first author during the surveys on flies of medical and forensic importance in Thailand from 1975 to 2011 is dealt with. A total of 29 genera and 83 species of the flesh flies are listed. Twelve species including Miltogramma iberica Villeneuve, 1912 are newly recorded from Thailand. One new species of the genus Robineauella Enderlein is described and illustrated, which is similar to Robineauella coei Rohdendorf, 1966 from Nepal and the widespread species R. pseudoscoparia (Kramer, 1911) in general appearance. Revised identification keys to the Thai species are provided including a new and newly recorded ones.