A floor frame system is provided to shorten a period of construction and to secure excellent constructability by supporting a floor board directly using a floor board support and to absorb noise and impact more effectively by attaching a shock absorbing plate and a shock absorbing member additionally. The floor frame system having excellent constructability contains a backing holder(5) coupled to a guide holder of a base plate installed on the bottom to be adjustable in height by a height regulator, and a floor board support(100) mounted on the backing holder to fix a floor board to the upper side directly. In addition, a shock absorbing plate is fixed to the upper side of the floor board support to support the floor board and to absorb noise and shock and a shock absorbing member is installed between the floor board support and the backing holder to absorb impact added from the upper part to the floor board support and the backing holder effectively.
