A connecting component for connecting different scaffolding systems (2, 3), comprising at least one first connection region which is provided for connection to a first scaffolding system and which has a shaft which extends along a longitudinal axis, and an attachment region which is provided for connection to a second scaffolding system, wherein the first connection region and the attachment region are arranged adjacent to one another in the direction of the longitudinal axis and the first connection region, at least on its side pointing away from the attachment region in its interior in the shaft, has a receptacle for the second scaffolding system, which extends in the direction of the longitudinal axis, and wherein the attachment region adjacent to the first connection region has an abutment for the second scaffolding system, which extends in a direction essentially perpendicular to the longitudinal axis and the abutment in the direction essentially perpendicular to the longitudinal axis has the longest dimension of the attachment region, and the attachment region also has an insertion region extending in the direction of the longitudinal axis and adjoining the abutment on the side thereof facing away from the first connection region in the direction of the longitudinal axis, characterized in that the insertion region has at least one first insertion interface, which comprises two first abutment surfaces (1221a, 1221b) for the second scaffolding system, oriented parallel to one another and/or symmetrically with respect to the longitudinal axis and are arranged in the radial direction to the longitudinal axis on the outside of the insertion region and are oriented parallel to the longitudinal axis, wherein the two first abutment surfaces (1221a, 1221b) form outer surfaces of the insertion region and are arranged on its outer circumference and the first insertion interface comprises at least one securing recess that penetrates the entire insertion region and extends essentially at a right angle to the two first abutment surfaces (1221a, 1221b), wherein the abutment projects further over the longitudinal axis in a first direction radial to the longitudinal axis, which has the longest dimension of the attachment region radial to the longitudinal axis, than in a second direction radial to the longitudinal axis and essentially perpendicular to the first direction. at least one first connection region which is provided for connection to a first scaffolding system and which has a shaft which extends along a longitudinal axis, and an attachment region which is provided for connection to a second scaffolding system, wherein the first connection region and the attachment region are arranged adjacent to one another in the direction of the longitudinal axis and the first connection region, at least on its side pointing away from the attachment region in its interior in the shaft, has a receptacle for the second scaffolding system, which extends in the direction of the longitudinal axis, and wherein the attachment region adjacent to the first connection region has an abutment for the second scaffolding system, which extends in a direction essentially perpendicular to the longitudinal axis and the abutment in the direction essentially perpendicular to the longitudinal axis has the longest dimension of the attachment region, and the attachment region also has an insertion region extending in the direction of the longitudinal axis and adjoining the abutment on the side thereof facing away from the first connection region in the direction of the longitudinal axis, characterized in that the insertion region has at least one first insertion interface, which comprises two first abutment surfaces (1221a, 1221b) for the second scaffolding system, oriented parallel to one another and/or symmetrically with respect to the longitudinal axis and are arranged in the radial direction to the longitudinal axis on the outside of the insertion region and are oriented parallel to the longitudinal axis, wherein the two first abutment surfaces (1221a, 1221b) form outer surfaces of the insertion region and are arranged on its outer circumference and the first insertion interface comprises at least one securing recess that penetrates the entire insertion region and extends essentially at a right angle to the two first abutment surfaces (1221a, 1221b), wherein the abutment projects further over the longitudinal axis in a first direction radial to the longitudinal axis, which has the longest dimension of the attachment region radial to the longitudinal axis, than in a second direction radial to the longitudinal axis and essentially perpendicular to the first direction.