CURRENT DETECTOR

PROBLEM TO BE SOLVED: To obtain a current detector in which the output of an magnetoelectric conversion element is increased and in which the detecting accuracy of a current is enhanced. SOLUTION: A magnetoelectric conversion element 3 and an amplifier circuit 5 are mounted on the surface of a circuit board 2. A through hole 6 is formed in the mounted lower part of the magnetoelectric conversion element 3 in the circuit board 2. A magnetic body 7 is inserted into the through hole 6. The circuit board 2 is sandwiched by a magnetic core 1 in such a way that the magnetoelectric conversion element 2 becomes the magnetic gap part of a magnetic path. A conductor wire 4 trough which a current to be detected flows is wound on the magnetic core 1. Both ends of the conductor wire 4 are used as input terminals of the current to be detected. Input/output terminals are attached to the circuit board 2. By this constitution, a magnetic flux density which is generated in the magnetic gap is increased, and the output of the magnetoelectric element 3 can be, increased.