Chelodina steindachneri, commonly known as the dinner-plate turtle, Steindachner's turtle and or Steindachner's flat-shell turtle, is a species of turtle in the family Chelidae. The species is the least known of the Australian turtles and also one of the smallest members of the long-necked turtles of the genus Chelodina. It is a member of the subgenus Chelodina making it closely related to the Chelodina longicollis group of species.
The specific name, steindachneri, is in honor of Austrian herpetologist Franz Steindachner.
C. steindachneri is endemic to the state of Western Australia in Australia.
The preferred natural habitats of C. steindachneri are freshwater rivers and freshwater swamps.