Subframe for vehicle

A vehicle subframe attached to a vehicle body of a vehicle, comprising:

• a cross member that extends in a width direction of the vehicle body, is arranged in a front-side portion of the vehicle body in a front-rear direction, allows a driving source that generates a driving force for driving the vehicle to be mounted thereon, and has a left front attachment portion to be attached to a left end in the width direction of the vehicle body and a right front attachment portion to be attached to a right end in the width direction of the vehicle body, in the front-side portion;
• a left side member that extends in the front-rear direction, is arranged in a left-side portion in the width direction, and has a left rear attachment portion to be attached to the left end in the width direction of the vehicle body in a rear-side portion in the front-rear direction;
• a right side member that extends in the front-rear direction, is arranged in a right-side portion in the width direction, and has a right rear attachment portion to be attached to the right end in the width direction of the vehicle body in the rear-side portion in the front-rear direction;
• a left coupling member that, to couple the cross member and the left side member to each other, has a left front coupling portion that is an end on a side close to the cross member and a left rear coupling portion that has a shorter length in the width direction than a length in the width direction of the left front coupling portion and is an end on a side close to the left side member;
• and
• a right coupling member that, to couple the cross member and the right side member to each other, has a right front coupling portion that is an end on the side close to the cross member and a right rear coupling portion that has a shorter length in the width direction than a length in the width direction of the right front coupling portion and is an end on a side close to the right side member,
• wherein
• the cross member has a lateral portion extending in the width direction, a left front portion located on a side of the lateral portion which is close to the left front attachment portion and extending in the front-rear direction, a right front portion located on a side of the lateral portion which is close to the right front attachment portion and extending in the front-rear direction to be opposed to the left front portion in parallel thereto, a left connecting portion connecting a left end in the width direction of the lateral portion and a rear end in the front-rear direction of the left front portion in a connection shape including a smoothly curved shape, and a right connecting portion connecting a right end in the width direction of the lateral portion and a rear end in the front-rear direction of the right front portion in a connection shape including a smoothly curved shape,
• the left coupling member is connected to the left front portion, the left connecting portion, and the lateral portion of the cross member in the left front coupling portion while covering the left connecting portion of the cross member in the width direction, and
• the right coupling member is connected the right front portion, the right connecting portion, and the lateral portion of the cross member in the right front coupling portion while covering the right connecting portion of the cross member in the width direction.