The application discloses a seat
massage device, a seat and a car. The device comprises
massage pieces and a bottom piece. A plurality of the
massage pieces are arranged side by side on the bottom piece in sequence, and each massage piece is in communication with an inner part of the bottom piece. During operation, each massage piece moves in an up-and-down reciprocating fluid manner, and a plurality of the massage pieces rotate to exhaust and inflate in turn. The application realizes fluid massage, and improves user experience. The application also provides a seat and a car.