Heinrich Brandler (3 July 1881 – 26 September 1967) was a German communist, trade unionist, politician, revolutionary activist, and political writer. Brandler is best remembered as the head of the Communist Party of Germany (KPD) during the party's ill-fated "March Action" of 1921 and aborted uprising of 1923, for which he was held responsible by the Communist International. Expelled from the Communist Party in December 1928, Brandler went on to become co-founder of the Communist Party of Germany Opposition, the first national section of the so-called International Right Opposition.