Safety belt for a vehicle

A safety belt for a vehicle, comprising:

• a pair of retractors provided in a rear surface of a seat back;
• a pair of belts extracting from the respective retractors and extending on a front surface of the seat back in a vertical direction;
• and
• a fastening unit for fastening the pair of belts to each other,
• wherein the fastening unit comprises:
• a tongue plate provided on either of the pair of belts;
• and
• a buckle provided on a remaining one of the pair of belts at a position corresponding to the tongue plate so that the tongue plate is removably fastened to the buckle,
• wherein the buckle comprises a connection member disposed on a first end of the buckle opposite to a second end thereof to which the tongue plate is fastened, the connection member having:
• a second insert slot into which the corresponding belt is inserted;
• and
• a second twist prevention slot into which the belt is inserted, the second twist prevention slot being disposed at a position adjacent to the second insert slot and at a slant with respect to the second insert slot to prevent the belt from being twisted,
• wherein an open recess is formed in the first end of the buckle in such a way that the first end of the buckle is open, wherein seating depressions corresponding to each other are formed in respective inner sidewalls of the open recess, and a through hole is formed in each of the seating depressions,
• a cover member is provided on the buckle to cover the seating depression, the cover member being hinged at a first end thereof to the buckle, with a coupling hole formed in a second end of the cover member, and
• a release pin is inserted into the through holes of the open recess via the coupling hole of the cover member.