Buckle device for seat belt of vehicle

1. A buckle device for a seatbelt of a vehicle, comprising:

a buckle bracket having an upper end with a hole for connecting with a seat belt and a lower end connected to a rail on a vehicle body floor by a buckle connection bolt; and

a wire fixing bracket connected between a side of the buckle bracket and a side of a seat frame and absorbing vibration of a seat,

wherein the wire fixing bracket comprises:

a wire member including at least a piece of wire;

a first bracket part including a first hole; and

a second bracket part including a second hole,

wherein the first bracket part is coupled to a first end of the wire member and the second bracket part is coupled to a second end of the wire member, and

wherein the first bracket part is fastened to the buckle bracket through the first hole and the second bracket part is fastened to the seat frame through the second hole.

2. The buckle device of claim 1 , wherein the wire member and the first and second bracket parts of the wire fixing bracket are prevented from separating in a longitudinal direction of the wire by protrusions formed on the wire member and grooves formed on the first and second bracket parts which are locked to each other.

3. The buckle device of claim 2 , wherein pressing portions that secure the wire member and the first and second bracket parts are formed in areas where the protrusions of the wire member and the grooves of the first and second bracket parts are locked.

4. The buckle device of claim 1 , wherein curved hooks that are to be locked to the buckle bracket and the seat frame are formed on the first and second bracket parts.