Mass Spectrometry Device

A mass spectrometer comprising:

• a plurality of multipole electrodes accommodated in a vacuum chamber;
• one holding member configured to hold the plurality of multipole electrodes such that ion optical axes of the plurality of multipole electrodes coincide with each other, and configured to enable movement of the plurality of multipole electrodes to an outside of the vacuum chamber;
• a power source provided outside the vacuum chamber;
• a power receiving substrate provided in the vacuum chamber;
• a supply terminal configured to electrically connect the power source and the power receiving substrate;
• a separating mechanism configured to separate the power receiving substrate attached to a holding member side from the supply terminal attached to a vacuum chamber side;
• and
• an operation lever attached to the holding member and configured to operate the separating mechanism, wherein
• the holding member moves the plurality of multipole electrodes to the outside of the vacuum chamber in a state in which the electrical connection between the power receiving substrate and the supply terminal is cut off,
• a separating direction in which the power receiving substrate and the supply terminal are separated by the separating mechanism is different from a moving direction in which the holding member is moved to the outside of the vacuum chamber, and
• the separating mechanism separates the power receiving substrate and the supply terminal by a first operation of the operation lever performed by a user, and the holding member is moved to the outside of the vacuum chamber by a second operation of the operation lever performed by the user.