The invention relates to an air spring with a roll-off piston (1) and with a rolling lobe (2) made of rubber or of a rubber-like material, whose at least one opening, which is opposite the opening assigned to the roll-off piston (1), is closed in an air-tight manner by a fastening part (3), and the fastening part (3) has a flat connecting area (4) with at least one air connection (7) and with an outer edge (11) and has a conical area (10) facing the rolling lobe (2). The rolling lobe (2) is vulcanized in a fixed manner together with the fastening part (3) in a vulcanizing area (12) extending from the side (9) of the outer edge (11) facing the rolling lobe (2) and into the conical area (10). The at least one fastening part (3), which is vulcanized onto the rolling lobe (2), is provided in the form of a head plate (3) that, together with all connections (7), is made of a thermoplastic or duroplastic material.