Phraya Si Sitthisongkhram (Thai: พระยาศรีสิทธิสงคราม) or birth name Din Tharap (Thai: ดิ่น ท่าราบ; 10 May 1891–23 October 1933) was a Siamese career army officer. He became chief of staff of the First Army under the absolute monarchy, and was chief of operations of the army briefly during the post-1932 constitutional monarchy. He served as deputy commander of the royalist troops during the failed Boworadet Rebellion of 1933.