Solomon Islands opposition leader Matthew Wale is urging the Australian government to investigate a rental deal involving the Australian Federal Police and a government politician in Honiara.

Mr Wale claimed the AFP is renting a beachfront property owned by Solomon Islands government MP Namson Tran in Tandai in West Honiara for $US24,540 a month.

According to him, the AFP's deal with Mr Tran raises a lot of questions surrounding AFP's independence and that it is likely to undermine the public's perception of their work in Honiara.

But the AFP has rejected Mr Wale's claims as "categorically false".

In an email response to RNZ Pacific, an AFP spokesperson said the AFP has leased a block of land in Honiara to support ongoing operational requirements.

The spokesperson said the process to lease this land was conducted in accordance with the Public Governance, Performance and Accountability Act 2013.