A shunt device for shunting cerebrospinal fluid (CSF) from a CSF containing space to a sinus system cavity (21 ) comprises a tubular inlet element, a flow restricting part, and a tubular outlet element having an outlet end (17) with an outlet opening (19) for insertion in the sinus system cavity (21 ), and the shunt device further comprises a one-way valve preventing flow in a direction from the outlet opening to the inlet opening. The shunt device further comprises a distancer (35), said distancer being provided at the outlet end (17) of the tubular outlet element and comprises at least three distance keepers (43a) each being positioned at a distance from the tubular outlet element in a direction perpendicular to a central longitudinal axis of the tubular outlet element at least in a use state of the shunt device.
