The transfer fee is believed to be in the region of £8.5m, believed to make him Norwich’s second most expensive player ever alongside Ricky Van Wolfswinkel and behind new Swiss centre-back Timm Klose.
Naismith joins Norwich on an three and a half year contract, and becomes Norwich’s fifth signing of the window after following Matt Jarvis, Ivo Pinto, Ben Godfrey and Timm Klose to Carrow Road on permanent deals.
Naismith joined Everton from Rangers in July 2012, after the Scottish club was forced to liquidate. In his time in Merseyside, Naismith has racked up 123 appearances and scored 26 goals for The Toffees.
He joins fellow Scottish internationals Graham Dorrans, Steven Whittaker and Russell Martin in East Anglia, making Norwich the most represented English side in the Scotland squad.
Naismith was a regular in the Everton side at the beginning of the season however lost his place to Arouna Kone. His most notable moment of the season was scoring a hat trick against reigning champions Chelsea.