Abstract: A junction-box bracket structure preventing vehicle-oscillation induced oscillation of the box comprises one bracket and the other bracket each attached to one wide-width surface and the other wide-width surface of a box body. The other bracket is engaged with the one bracket upon brackets-surfaces attachment. The one bracket is slid in one direction of the body toward the other surface and engaged with the body, and the other bracket is slid toward the one surface in the other direction and engaged with the body. A locking-portion of the one bracket goes beyond a first engagement-portion of the body for engagement therewith in the one direction. A locking-portion of the other bracket goes beyond a second engagement-portion of the body for engagement therewith in the other direction. A second locking-portion of the other bracket goes beyond a second engagement-portion of the one bracket for engagement therewith in the other direction.