A support device of an active part of a current transformer includes a plurality of insulating support legs which are composed of an electrically insulating material and which are constructed to carry the active part and to be supported on a housing base of a housing of the current transformer. A longitudinal axis of each insulating support leg forms a non-zero support angle with the direction of gravitational force or the vertical. A current transformer including a housing, an active part disposed in the housing and the support device for supporting the active part, is also provided.