Cushion spring

A cushion spring configured to receive a load of a seated occupant by a surface of the cushion spring, the cushion spring comprising:

• a formed wire configured to be bridged to a seat cushion frame in a seat front-rear direction;
• and
• a resin member that is joined to the formed wire, wherein
• the formed wire is formed of one wire having a center wire and a side wire that are arranged side by side in a seat width direction and extend in the seat front-rear direction such that one ends of the center wire and the side wire are connected to each other,
• the center wire and the side wire are arranged in an order of the center wire and the side wire from a center of the seat cushion frame to an outer side in the seat width direction,
• the center wire and the side wire each include a plurality of crank-shaped portions that are bent to fold in a crank shape to one side and the other side in the seat width direction alternately, and
• the resin member includes a deflection restricting portion that connects the plurality of crank-shaped portions to restrict a divergence in the seat front-rear direction between three or more crank-shaped portions, the three or more crank-shaped portions being formed in the side wire and arranged side by side consecutively in the seat front-rear direction.