"Inflation expectations are still very high," Campos Neto told a seminar hosted by newspaper Folha de S.Paulo on Monday, highlighting elevated long-term forecasts as particularly problematic.
"Long-term forecasts remained little changed," the central bank chief said.
"And we have a problem that are long-term inflation expectations persistently stuck around 4%".
In the minutes of its May meeting, the central bank expressed concerns about inflation expectations, saying it continued "to assess that de-anchored expectations raise the cost of bringing inflation back to the target".
Campos Neto acknowledged that headline inflation has been slowing down in Brazil, but noted that the core index remains "high" and "well above target".