The device was planted inside a chair and found during a routine sweep of the room in the lead up to the opening Rugby Championship clash on Saturday night.
New Zealand Rugby (NZR) said in a statement that police have been called in to investigate.
"A listening device was found in a meeting room this week during a routine security check," NZR chief executive Steve Tew said.
"The hotel immediately launched an investigation, we have informed the Australian Rugby Union, and jointly we have now decided to hand over the investigation to the Australian police.
