Police were called at 3.45pm to Warwick Road, SW5 to reports of a pedal cycle in collision with a car towing a trailer.
The female cyclist, aged 68, was sadly pronounced dead at the scene.
Next of kin has been informed.
The driver of the car stopped at the scene. There have been no arrests.
Anyone who witnessed this incident is asked to contact Detectives by calling the SCIU witness line on 020 8543 5157.