The invention is to obtain a vehicle seat sliding device of a novel configuration that is capable of sliding the seat more smoothly with respect to the floor. The vehicle seat sliding device includesa rotary member (20) that integrally rotates with a screw rod (19); a swinging member (21) that is supported on an upper rail (6) in a manner capable of swinging in a state in which the rotation around a rotational center (Ax0) is restricted and that rotatively supports the rotary member (20) and integrally swings with the rotary member (20); and receiving members (22, 23) that are fixed to a lower rail (5) and support the swinging member (21) in a manner capable of swinging.