To provide a rotational impact tester that can easily obtain accurate data.

This rotational impact tester comprises a rotating table 7 with its frame 5 rotatably borne on a base 6 via a roller bearing section 4 which holds a plurality of conical roller string 1 between inner and outer rings 2, 3 so as to complementarily bear opposite directional axial load, and an impact strength imparting means 9 which collides with a collided section 8, formed on the rotating table 7 to provide the rotating table 7 with impulsive torque.