Relaxing seat for vehicle

A relaxing seat for a vehicle, the relaxing seat comprising:

• a fixed rail fixed to a vehicle body and extending in a front and a rear direction thereof;
• a first moving rail coupled to the fixed rail to be movable frontwards and backwards thereof along the fixed rail;
• a second moving rail coupled to the first moving rail to be movable frontwards and backwards thereof along the first moving rail;
• a back link, first and second end portions of which are rotatably coupled to the fixed rail and a seat back frame, respectively;
• a cushion rear-side link including a first end portion and a second end portion, wherein the first end portion is rotatably coupled to a portion at which a lower end portion of the seat back frame and a rear end portion of a seat cushion frame are rotatably coupled to each other, and the second end portion is rotatably coupled to the first moving rail;
• and
• a cushion front-side frame including a first end portion and a second end portion, wherein the first end portion of the cushion front-side frame is rotatably coupled to a front end portion of the seat cushion frame, and the second end portion of the cushion front-side frame is fixedly coupled to the second moving rail.