Rottnest Island has taken delivery of a $180,000 ambulance.
The Rottnest Island Nursing Post treats about 4000 patients every year and the new all-wheel-drive vehicle will give staff, visitors and residents "greater reliability of service", according to Health Minister Kim Hames.
The ambulance replaces a troop carrier in use since 2003.
Mr Hames said replacing the troop carrier would allow nursing post staff to provide a high level of patient care when responding to medical emergencies on the island.
"The 'troopy' has served the nursing post well but due to the harsh environmental conditions at Rottnest, it needed to be replaced to ensure the post could continue to provide the highest quality of care to island visitors and residents," he said.