Punters will hope Jerome Kaino and the All Blacks can help fill their wallets.

The largest wager in the history of the New Zealand TAB has been made, and it's on the All Blacks.

A North Island punter on Saturday placed $400,000 on the All Blacks to win the Rugby World Cup final, paying $1.35. Should the punter, from an undisclosed location in the North Island, win his bet he will make $140,000 on his investment.

The previous biggest bet made with the TAB was $220,000 placed on Brazil to beat China during the 2002 Fifa World Cup.

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Most money is on the All Blacks to win the Rugby World Cup at Twickenham in London on Sunday morning (NZ time), although nearly half of punters have backed Australia at the New Zealand TAB this week.

Figures released by the TAB show 86 per cent of the money is on the All Blacks as outright winners, with some massive bets coming in for the tournament favourites.

That hasn't translated into a huge majority of bets going on the All Blacks, however, with only 57 per cent of total bets this week coming for New Zealand.

Australia has been backed to win the final by 43 per cent of punters, perhaps as happiness insurance should the All Blacks fail to win.

New Zealand are paying $1.35 for the win, while Australia are paying $3.

Prior to Saturday morning's $400,000 bet, the largest bet on the tournament was against the All Blacks, with one Auckland punter putting $130,000 of their hard-earned on anyone but the All Blacks to win the World Cup at $1.55, returning $201,500 if it pays off.

Another Auckland punter has $100,000 on the All Blacks to win the World Cup at $1.60, returning $160,000, while a Waikato punter has $50,000 on the All Blacks at $2.25, returning $112,500.