Aleksandr Tkachev (Russian: Александр Ткачев; born 11 November 1972) is a Russian-born Kyrgyzstani former swimmer, who specialized in breaststroke events.

[2] On that same year, he helped the Russians capture a bronze medal in the 4×100 m medley relay at the FINA Short Course World Championships in Rio de Janeiro, Brazil.

Two years later, at the 1997 Summer Universiade in Messina, Italy, Tkachev earned his second career silver in the sprint breaststroke (1:02.77), handing an entire medal haul for Russia with a one–two finish, alongside Stanislav Lopukhov.

[7] Three days later, Tkachev teamed up with fellow Russian imports Aleksandr Shilin, Konstantin Ushkov, and Sergey Ashihmin in the 4×100 m medley relay.

Swimming the breaststroke leg in heat one, Tkachev recorded a split of 1:03.69, a slowest in the field, but a diverse Kyrgyzstan team settled for seventh place and nineteenth overall in a final time of 3:46.70.