Visitor’s visa and residence permit
A visitor's visa allows you to stay in Norway or other Schengen countries for up to 90 days over a period of 180 days. A residence permit gives you the opportunity to work in Norway and to stay for more than 90 days.
Nationals of Greece do not need a visitor's visa. Likewise, they do not need a residence permit, but must register with the police within three months.
EU/EEC citizens can visit and work in Norway for up to 90 days without any permit. After 90 days they have to register with the police.
With a residence permit from an EU country and a valid passport, you can visit Norway for a maximum period of 90 days without a visitor's visa.