PROBLEM TO BE SOLVED: To provide a soundproof structure of a rail, which enables a covering material to be firmly fixed to the rail, which facilitates manufacturing and construction, and which can enhance a soundproof effect.
SOLUTION: A right-side covering member 8a is mounted on the right-side lateral surface of the rail R, and a left-side covering member 8b is mounted on the left-side lateral surface of the rail R. After that, a right-side holding member 11a is mounted on the member 8a at a predetermined interval in the longitudinal direction of the rail R, and a left-side holding member 11b is mounted on the member 8b. Subsequently, a bolt 11h is inserted into through-holes 11f and 11g, and a nut 11i is attached to the bolt 11h, so that the members 11a and 11b can be connected together. Thus, even if increasing in thickness and weight, the covering member 8 can be firmly fixed to the rail R by means of a fixing member 11. Consequently, since vibrations generated on the rail R are reduced and acoustic radiation from the rail R is suppressed, a soundproof and vibration-control effect can be enhanced.