Abstract: A screw type inerter mechanism includes a screw with a limit portion and a thread portion with threads; a screw cap engaged with the thread portion of the screw; an inertia body fixed to the limit portion of the screw; and a connection body engaged with the limit portion of the screw wherein an axial of the screw serves as a rotation axial for the screw to rotate relatively to the connection body. Thus, when a non-zero external force is applied to the inerter mechanism to generate relative horizontal displacement between the screw cap and the connection body, the screw cap brings the screw to rotate, which further brings the inertia body to rotate, thereby achieving the inerter features.