The invention relates to a spacer (1) for a reinforcement layer (16), a reinforcement system (29) for a concrete component (21), and a method for the production of a reinforcement system (29).The spacers (1) described allow especially mesh-type reinforcement layers (16) to be kept at a distance from other bodies (24, 28) in a particularly simple manner. The spacers (1) are fitted by inserting them into a mesh (8) of the reinforcement layer (16) and connecting them thereto by twisting.