The present invention relates to a spark plug for an internal combustion engine, comprising an electrical connecting means (8) at a connection-side end (11), an end (10) on the combustion-chamber side and pointing towards a combustion chamber, an insulator (2) and a housing (3) with a thread (4) for attaching the spark plug to an engine component, with a first sealing area (20) and a second sealing area (21) being formed between the insulator (2) and the housing (3), with the first sealing area (20) being arranged closer to the connection-side end (11), and with the second sealing area (21) being arranged closer to the end (10) on the combustion-chamber side, with a tool engagement area (6) being arranged adjacent to an area (L1) of the spark plug which is located between the connection-side end (11) and the first sealing area (20) in order to transmit a torque to the spark plug in order to fit or to move the spark plug.