Magnetic particle operation device

A magnetic particle operation device comprising:

• a tubular container having a longitudinal shape and including
• a sample introduction space accommodating magnetic particles in which a target substance is immobilized to the magnetic particles, the target substance being included in a sample to be received from outside of the tubular container, the sample introduction space having a protruding portion with a recessed portion formed on an inner surface of the protruding portion within the tubular container, and
• a sample movement space in which a gel-like medium layer and a liquid layer are alternately arranged in a longitudinal direction of the sample movement space;
• a first magnet detachably attached to an outer surface of the protruding portion of the tubular container to face the sample introduction space, the first magnet configured to apply a first magnetic force to the magnetic particles, thereby holding the magnetic particles in the sample introduction space in the tubular container, and
• a second magnet provided outside the tubular container to face the container, and longitudinally movable along the container, the second magnet configured to apply a second magnetic force to the magnetic particles, thereby moving the magnetic particles from the sample introduction space to the sample movement space, passing through the gel-like medium layer and the liquid layer in the longitudinal direction.