In this paper, we investigate the relationship between personality and manipulation in coupled human balancing tasks. For this purpose, we propose a measurement system to obtain the balancing error product by two human subjects stabilizing a coupled inverted pendulum model in cooperation. After the experiment, we performed the Yatabe-Guilford personality test. The result shows that the correlation analysis on personality and motion of the subjects implies that some correlations can be found between the human balancing error and the personality.