The utility model discloses an electroscope. The electroscope comprises an induction electrode, an electroscope head and a turning device, wherein the induction electrode comprises an induction head and a connecting rod connected with the induction head; one end of the electroscope head is connected with the connecting rod; and the turning device comprises a rotation part made of an insulation material and a fastening part, the range of the angle between the rotation part and the fastening part is from 0 degree to 90 degrees, and the rotation part is connected with the other end of the electroscope head. Since a certain angle is formed between the rotation part made of the insulation material and the fastening part in the electroscope, the induction electrode is in good contact with a lead, and at the same time, the rotation part made of the insulation material reduces the influence of an electric field on the electroscope, avoids the influence on starting voltage and improves the alarm accuracy of the electroscope.