SOUNDPROOF FLOOR STRUCTURE

PROBLEM TO BE SOLVED: To provide a soundproof floor structure to effectively suppress the impact sound of a floor in a hung ceiling structure of a wooden house. SOLUTION: The soundproof floor structure comprises a floor member 4 including a vinyl chloride resin sound insulating mat 8, a beam 12 to support a lower side of a periphery of the floor member 4, a first floor joist 14 to support an intermediate portion of the floor member 4 from a lower side, a hanging wood member 40 in which an upper end portion thereof is joined with the first floor joist 14, a lower end portion thereof is joined with the second floor joist 18, and the upper end portion is connected to the lower end portion via vibration control members 50 and 52, a hung ceiling member 20 including a vibration control and sound insulating board with the second floor joist 18 joined with an upper surface, and a vibration control and sound insulating sheet 30 to be fitted between an outer peripheral end of the hung ceiling member 20 and the beam 12.