Shimon Rudolf "Rudi" Weissenstein (Hebrew: רודי ויסנשטין; February 17, 1910 – October 20, 1992) was an Israeli photographer.

The only photographs of Israel's declaration of independence by David Ben Gurion in 1948 are by Weissenstein, who built a collection of over a million negatives.

He continued to work as a photographer and journalist and in 1940 married Miriam Arnstein (1913–2011), who had studied dance and acrobatics in Vienna and had emigrated to Palestine before Weissenstein.

Weissenstein documented the Jewish everyday and cultural life in Tel Aviv, including numerous prominent personalities – artists and politicians, such as Marc Chagall, Max Brod, Eleanor Roosevelt, Isaac Stern and the painter Nahum Gutman.

Since 2011, the archive and Photo House is managed by his grandson Ben Peter Weissenstein in a new store on Tshernichovski Street, received from the Tel Aviv municipality.