Brenton Tarrant is charged with the murder of 51 people, 40 counts of attempted murder and one terrorism charge in New Zealand’s deadliest peace time mass shooting.
Appearing via video link from prison, the 29-year-old Australian sat silently as his lawyer read out his plea.
The 15 March attack saw a gunman open fire on Muslims during Friday prayers.
This is the first time a terrorism charge has been brought in New Zealand.
A number of the survivors of the attack and relatives of the victims were in court for the hearing, the BBC’s Sydney correspondent Hywel Griffith reported.