To provide a transformer for a meter simultaneously realizing simplification and rationalization of a system structure, and high precision by temperature compensation.

In this transformer, an electronic circuit board 3 is disposed near a capacitive divider 2 and a Rogowskii coil 1 that are a detection means, while a temperature sensor 4 is provided on the electronic circuit board 3. The electronic circuit board 3 is configured such that temperature characteristics of the Rogowskii coil 1 and the capacitive divider 2 and compensated on the basis of an output of the temperature sensor 4 to keep a transformation ratio constant. A high-order system 15 and the electronic circuit board 3 are connected with an optical communication cable 10.