Abstract: An infant seat rocking device for providing a smooth rocking motion for an infant without relying on the infant's own movement of the parent sitting with the child and rocking the seat. The infant seat rocking device includes a seat. The seat support member has a base portion, an upright portion and a connection portion. The upright portion of the seat support member extends from the seat offset with respect to a center of gravity of the seat for permitting rocking of the seat. A seat moving assembly is coupled to the seat support member. The seat moving assembly includes a crank arm and a strap member that extends from a distal end portion of the crank arm. The strap member has an end opposite the crank arm coupled to the seat member whereby rotation of the crank arm pulls on the seat for providing movement of the seat.