Bernhard Hammer (3 March 1822, in Olten – 6 April 1907) was a Swiss politician. He was the peloton leader of the Olten cadet military group. In 1844, after studying sciences and law, Hammer settled in Solothurn as a lawyer and a notary, but he worked in Berlin, Zurich and Geneve too. General Henri Dufour had already personally distinguished him in the Sonderbund campaign, and the General Staff officer Hammer was promoted to Major in 1858 and Supreme in 1862. In 1861-68 he was chief instructor (chief of arms) of the artillery and afterwards until 1875 Switzerland envoy in Berlin.