The father of a cave-diving Australian doctor died on Wednesday, shortly after his son played a key role in rescuing a boys' soccer team trapped in a cave for two weeks in northern Thailand.

Anesthetist Richard Harris, who did the final medical checks of the 12 trapped boys and their coach, was among the divers who successfully ended on Tuesday a mission that had gripped the attention of the world.

"Early this morning Harry's father passed away here in Adelaide ... after they'd all come out of the cave," said Andrew Pearce, of rescue service MedSTAR in the Australian city, where Harris, also known as Harry, is a specialist.