Mohammad Hassan Mirza Qajar (Persian: شاهزاده محمدحسن میرزا قاجار; 20 November 1899 – 7 January 1943) was the brother of Ahmad Shah Qajar of Iran, and former Crown Prince of the Qajar dynasty. Soon after Reza Shah deposed the Qajar dynasty and made himself Shah of Iran in 1925, Prince Mohammad Hassan and his family were sent into permanent exile to England. In 1930, he declared himself the rightful heir to the crown as pretender to the throne. He died on 7 January 1943 in Maidenhead, England and was buried in Kerbala, Iraq.