SM UB-87 was a German Type UB III submarine or U-boat in the German Imperial Navy () during World War I. She was commissioned into the German Imperial Navy on 27 December 1917 as SM UB-87. UB-87 was surrendered to France on 20 November 1918 in accordance with the requirements of the Armistice with Germany. She was broken up in Brest in 1921.