The Parliament is the highest decision-making body within the Science Student Union. It is composed of a proportional number of student representatives from each Student Council. It is led by a Chairperson and a Secretary, both of whom are elected by the Parliament.
 

The Parliament's responsibilities include adopting the annual budget and operational plan, electing student representatives to central university bodies, and appointing key union positions such as committee chairpersons, board members, and the presidium. As the union's highest authority, the Parliament must also approve actions taken by the Board and Presidium, as well as any changes to the union's regulatory documents.