Manufacturing activity has remained solid despite the recent rise in the New Zealand dollar against the Australian dollar.
A large proportion of New Zealand's manufactured exports are to Australia and the New Zealand dollar has risen to its highest level since 2008.
The currency has risen more than 8% against the Australian dollar since March.
The Bank of New Zealand/BusinessNZ performance of manufacturing index, or PMI, fell 4.3 points from May to 54.7.
However, it's the highest level for a June month since 2004.
A reading above 50 indicates expansion and the May result was the highest recorded since June 2004.
BNZ economist Craig Ebert said the gap between the New Zealand and Australian currency has now returned to what it was and the windfall that New Zealand had over the last few years with the Australian dollar being very low has now dissipated.