Abstract: A magnetic head carriage device includes a carriage base on which a lower head is mounted, and an upper arm on which an upper head confronting the lower head is mounted, the upper arm having a width in a lateral direction and a base portion at which the upper arm is fixed to the carriage base, the upper arm being vertically movable to the carriage base around the base portion. A head load spring exerts a downward actuating force on the upper arm such that the upper arm is pressed toward the carriage base, the head load spring having an end portion at which the head load spring downwardly presses the upper arm and a base portion at which the head load spring is fixed to the carriage base. A spring guide mechanism restricts a movement of the end portion of the head load spring in the lateral direction such that the end portion is maintained in the center of the width of the upper arm.