The 1955 1000 km Buenos Aires took place on 23 January, on the Autódromo Municipal-Avenida Paz, (Buenos Aires, Argentina). It was the second running of the race, and once again, it was opening round of the F.I.A. World Sports Car Championship. For this event, a longer section of the Autopista General Pablo Riccheri route was added, making the circuit 17.136 km in length.