Seat apparatus for vehicle

A seat apparatus for a vehicle comprising:

• a seat cushion;
• a seatback standing upward from the seat cushion and that supports a back of a person sitting on the seat cushion;
• a conversion mechanism that converts a disposition of the seatback between a normal position to a converted position, the normal position being a position at which the seatback is disposed at a rear section of the seat cushion and a sitting direction of an occupant is facing forward, the converted position being a position at which the seatback is disposed at a front section of the seat cushion and a sitting direction of an occupant is facing rearward;
• and
• a reclining mechanism that biases the seatback toward a neutral position at which the seatback stands upward and that reclines the seatback forward and rearward from the neutral position,
• wherein the reclining mechanism comprises:
• a reclining shaft that is provided at a lower end of the seatback and that is a shaft about which the seatback is reclined forward and rearward from the neutral position, and
• a biasing member disposed in a radial direction of the reclining shaft when the seatback is disposed at the neutral position,
• a first end of the biasing member is engaged with an eccentric section of the seatback separated from the reclining shaft and a second end of the biasing member is engaged with a non-reclining member that reclinably support the seatback, and
• the biasing member elongates when the seatback is reclined forward or rearward from the neutral position to accumulate a biasing force.