Juan Martín Aranguren (born 10 July 1983)[1] is a retired Argentine professional tennis player who played primarily ITF and Challengers events.

[2] Aranguren made his ATP Tour debut at the 2006 Romanian Open in Bucharest, when he successfully advanced through three qualifying rounds to reach the main draw.

The following year at the 2007 Romanian Open he received a wild card entry into the doubles main draw, alongside compatriot Gustavo Marcaccio where they were defeated in the first round by Sergio Roitman and Filippo Volandri 2–6, 4–6.

He would go on to receive entry into the 2008 Buenos Aires Open main draw as an alternate pair, alongside another compatriot Diego Junqueira but again lost in the first round this time to Peter Luczak and Werner Eschauer in a three setter 6–4, 3–6, 13–15.

He defeated Federico Delbonis 7–6(7–3), 5–7, 6–1 Gastón Gaudio 3–6, 6–3, 6–1, and Boris Pašanski 6–3, 6–1 before losing in the first round to fellow qualifier David Marrero in three tight sets 6–7(4–7), 6–2, 6–7(2–7).