A sensor for detecting particles, in particular soot particles. The sensor comprises at least two measuring electrodes which are situated on a first layer made of an electrically insulating or conductive material, and at least two supply lines for the measuring electrodes. The supply lines are connected to the measuring electrodes respectively in a connection region. The supply lines are covered by at least one second layer made of an electrically insulating material such that the connection region is not covered by the second layer made of an electrically insulating material.