Abstract: A portable arm wrestling training machine including an elongated, longitudinally-extending supporting frame suitable for placement on a table top and a mechanical wrestling arm assembly pivotally affixed at its lower end to the supporting frame and bearing at its upper end a handgrip member for hand grasp engagement by the wrestling arm hand of a training arm wrestler. The arm assembly is rotatable between a substantially horizontal position adjacent the frame and a substantially vertical position and is provided with a force-biasing mechanism which applies a pivot resistive force to the arm assembly tending to maintain the arm assembly in its vertical position. The mechanical wrestling arm assembly and force-biasing mechanism cooperate to simulate in movement and force pattern the defensive arm movement and resistive forces of an experienced arm wrestler in opposition to the arm rotational forces applied to the arm assembly by the arm wrestling trainee.