Molded foam body

A molded foam body which has a seat surface on which an occupant is seated and is formed of a foam of a synthetic resin material, comprising:

• a thigh rest part that is positioned on a front part and supports thighs of the occupant;
• and
• a hip rest part that extends rearward from a rear end part of the thigh rest part and supports hips of the occupant,
• wherein the molded foam body is formed of a first synthetic resin material and a second synthetic resin material that has higher hardness than the first synthetic resin material,
• wherein an entire upper part on the seat surface side is formed of the first synthetic resin material,
• wherein both sides of a lower part that is positioned opposite to the seat surface in a left-right direction are formed of the second synthetic resin material, and a middle part positioned between both sides in the left-right direction is formed of the first synthetic resin material and integrated with the upper part,
• wherein a pair of left and right second synthetic resin materials forming the lower part have a rear part that is positioned in the hip rest part and a front part that is connected to a front end of the rear part and at least a front end part of which is positioned in the thigh rest part,
• wherein, with respect to a contour indicating an outer circumferential surface of a three-dimensional model, which is used in defining automobile seating accommodation (3DM-JM50) prescribed in the Japanese Industrial Standards JIS D4607-1977, generated when the model is placed on the seat surface in a plan view of the seat surface, the rear part extends inward in the left-right direction and the front part is positioned outside in the left-right direction, and
• wherein, in a plan view of the seat surface, a plane area of a part surrounded by an inner edge of the rear part in the left-right direction and the contour is larger than a plane area of a part sandwiched by an inner edge of the front part in the left-right direction and the contour in the left-right direction.