Prince Chudadhuj Dharadilok, Prince of Phetchabun (Thai: จุฑาธุชธราดิลก; RTGS: Chuthathut Tharadilok), (4 July 1892– 8 July 1923) was a son of King Chulalongkorn and Queen Saovabha of Thailand. He was one of the most senior Thai princes during the rule of his full brother, King Vajiravudh.