Johannes Kleiman (17 August 1896 – 28 January 1959) was one of the Dutch residents who helped hide Anne Frank and her family during the Nazi occupation of the Netherlands.

Johannes Kleiman became a member of the board of Opekta and the company was established at his home address for the next five months until it moved to Prinsengracht 263 at the end of 1940.

He officially joined as bookkeeper for both Opekta and Pectacon, with Victor Kugler and secretary Bep Voskuijl for Pectacon, and Otto Frank and his secretary Miep Gies for Opekta.

Kleiman was imprisoned in the Amersfoort labour camp before he was released by special dispensation of the Red Cross because of his ill health.

On 8 March 1972, Yad Vashem recognized Kleiman as one of the Righteous Among the Nations.