Vehicular seat

A vehicular seat which has a seat section and a seat back section connected thereto, comprising:

• a pair of lower horizontal arms attached to the lower portion of the seat back section so as to be swingable within a horizontal plane, said lower horizontal arms each having, at the distal end portion thereof, lower support means for supporting the hipbone region of a user's body, and wherein each of said lower horizontal arms is fixed in a predetermined angular position by means of first fixing means;
• a pair of upper horizontal arms protruding from the top of the seat back section so as to be swingable within a horizontal plane, said upper horizontal arms each having, at the distal end portion thereof, upper support means for supporting the bladebone regions of the user's body,
• and wherein each of said upper horizontal arms is fixed in a predetermined angular position by means of second fixing means,
• the respective proximal end portions of said lower horizontal arms being transversely movable inside the seat back section, and
• said upper horizontal arms being transversely movable in association with the lower horizontal arms and adjustable in height relative to the lower horizontal arms.