A vibration meter comprising: a light source (104; 304); an optical fiber (114; 314) configured to guide light from the light source (104; 304); a vibration probe (130; 330; 530; 630) on which the guided light is at least partly incident; an optical receiver photoelectric-converting light configured to be modulated by a vibration of a movable member (156; 158; 258) located in the vibration probe (130; 330; 530; 630) to output the light as an electrical signal; a processor configured to process the electrical signal to output a state of the vibration as an output voltage value; the vibration meter characterized in that it further comprises a velocity pickup (150; 250; 350; 750) configured to convert a velocity of the movable member (156; 158; 258) resulting from the vibration of the movable member (156; 158; 258) into an electrical current; a solenoidal coil configured to generate a magnetic field by the electrical current; and a magnetic field sensor (131; 331; 631; 731) configured to attenuate an amount of light guided to the vibration probe (130; 330; 530; 630) according to an intensity of the magnetic field; wherein the velocity pickup (150; 250; 350; 750) comprises: a coil connected to the solenoidal coil; and a permanent magnet configured to provide a magnetic field to the coil, wherein the coil is configured to relatively vibrate with respect to the permanent magnet, wherein the movable member (156; 158; 258) either includes the coil or the permanent magnet, and wherein the magnetic field sensor (131; 331; 631; 731) comprises: a polarizer configured to linearly polarize light guided to the vibration probe (130; 330; 530; 630); and at least one Faraday rotator (136; 138; 336; 338; 636) configured to rotate polarization of light passing through the polarizer by the intensity of the magnetic field. a light source (104; 304); an optical fiber (114; 314) configured to guide light from the light source (104; 304); a vibration probe (130; 330; 530; 630) on which the guided light is at least partly incident; an optical receiver photoelectric-converting light configured to be modulated by a vibration of a movable member (156; 158; 258) located in the vibration probe (130; 330; 530; 630) to output the light as an electrical signal; a processor configured to process the electrical signal to output a state of the vibration as an output voltage value; the vibration meter characterized in that it further comprises a velocity pickup (150; 250; 350; 750) configured to convert a velocity of the movable member (156; 158; 258) resulting from the vibration of the movable member (156; 158; 258) into an electrical current; a solenoidal coil configured to generate a magnetic field by the electrical current; and a magnetic field sensor (131; 331; 631; 731) configured to attenuate an amount of light guided to the vibration probe (130; 330; 530; 630) according to an intensity of the magnetic field; a coil connected to the solenoidal coil; and a permanent magnet configured to provide a magnetic field to the coil, a polarizer configured to linearly polarize light guided to the vibration probe (130; 330; 530; 630); and at least one Faraday rotator (136; 138; 336; 338; 636) configured to rotate polarization of light passing through the polarizer by the intensity of the magnetic field.