Seat frame for vehicle

A vehicle seat frame comprising:

• a seat cushion frame;
• a seat back frame;
• a first coupling bracket configured to couple a first cushion side frame as a side frame of the seat cushion frame on one side of the vehicle seat frame and a first seat back side frame as a side frame of the seat back frame on the one side;
• and
• a second coupling bracket configured to couple a second cushion side frame as a side frame of the seat cushion frame on an other side of the vehicle seat frame and a second seat back side frame as a side frame of the seat back frame on the other side;
• wherein the first coupling bracket includes
• a first seat-back-side coupling region having a portion to be coupled to the first seat back side frame,
• a first cushion-side coupling region having a portion to be coupled to the first cushion side frame, and
• a first weak portion that connects the first seat-back-side coupling region and the first cushion-side coupling region together;
• wherein the second coupling bracket includes
• a second seat-back-side coupling region having a portion to be coupled to the second seat back side frame,
• a second cushion-side coupling region having a portion to be coupled to the second cushion side frame, and
• a second weak portion that connects the second seat-back-side coupling region and the second cushion-side coupling region together;
• and
• wherein an offset amount in a seat width direction between a surface forming the first seat-back-side coupling region and a surface forming the first cushion-side coupling region at the first coupling bracket is different from an offset amount in the seat width direction between a surface forming the second seat-back-side coupling region and a surface forming the second cushion-side coupling region at the second coupling bracket.