Adriaan Robert "Sloot" Slotemaker (13 June 1929 – 16 September 1979) was a Dutch racing driver.

He entered one Formula One World Championship race, the 1962 Dutch Grand Prix, with one of Carel Godin de Beaufort's Porsches, but his car was not ready in time for the event. His entry was taken by Wolfgang Seidel. Throughout the 1960s Slotemaker competed in the 24 Hours of Le Mans race, and was a driver and advisor for the Le Mans film in 1970.

In 1956, he established his "Anti-skid" driving school at Zandvoort, which is still operating today.

On 16 September 1979, at the Circuit Park Zandvoort, Slotemaker was killed when he crashed his Chevrolet Camaro during the "Trophy of the Dunes" touring car race. His car spun on a patch of oil and collided with a course car parked alongside the track. Despite the relatively minor force of the accident, he suffered a broken neck and died instantly. A doctor in the course car was also injured.

A section of the circuit, the right-hander past Hunzerug, is named in his memory.