Am I allowed to work on a student visa?
Nordic, EU/EEA or Swiss citizens can work in Denmark under the EU rules regarding the free movement of people and services, with no restriction on the number of hours.
However there are limits if you still want to receive SU while working.
Non-EU/EEA/Swiss citizens may work in Denmark for up to 15 hours a week and full-time during June, July and August. However, this requires a work permit sticker in your passport.
Read more about this at the links below.