Victorian paramedics are threatening to hit state government revenues in a battle over ambos' ability to join bushfire relief efforts.

The paramedics' union is demanding – among other improved conditions – paid leave for the almost 30 paramedics who are also army reservists, about 15 of whom have been deployed to bushfire-hit areas this summer, assisting the Australian Defence Force's relief efforts.

Union boss Danny Hill says paramedics "shouldn't be taking a hit to their hip pocket" for aiding bushfire relief efforts. Credit:AAP

Union boss Danny Hill said professional paramedics were likely providing a "far higher" standard of care than ADF medics because of their day-to-day expertise in treating patients.

"We've got some of the best paramedics in the world. For them to be using their skills to assist in a time of crisis provides an immeasurable benefit to the community," he said.