The guide apparatus for a long object comprises: a movable portion that is capable of reciprocal movement in a reciprocal direction; a fixed portion; a pair of sheets that have flexibility; and a guide member. The fixed portion is fixed so that the movement in the reciprocal direction is not possible. The pair of sheets, with a curved part formed at an intermediate position in the longitudinal direction, couple the movable portion and the fixed portion. The guide member reciprocates in the reciprocal direction while guiding the movable portion and the pair of sheets so that the pair of sheets reciprocate in the reciprocal direction as the curved part is shifted in accordance with the reciprocal movement of the movable portion. The guide member forms, together with the pair of sheets, a storage chamber for storing a long object.