Magnetic field measuring apparatus

A magnetic field measuring apparatus for measuring a to-be-measured magnetic field, comprising:

• a magnetic impedance element with an impedance change rate that changes depending on the to-be-measured magnetic field;
• a drive signal providing section arranged to provide a drive signal to the magnetic impedance element;
• and
• a measurement range setting section arranged to set a measurement range in which the to-be-measured magnetic field can be measured, wherein
• a relationship between the to-be-measured magnetic field and the impedance change rate is arranged to change depending on a frequency of the drive signal,
• the measurement range setting section is arranged to set the measurement range by setting the frequency, and
• the measurement range setting section is arranged to reduce an upper limit to which the to-be-measured magnetic field can be measured.