Three Mongolian groups (Elute, Bargud and Buriat) were investigated on seven asymmetric behavioral traits (handedness, hand clasping, arm folding, leg folding, foot preference, stride type and eye preference) in Hulun Buir League, Inner Mongolia, in September, 1997. The results were as follows: 1) In the Mongols of Hulun Buir League, handedness, leg folding, foot preference, stride type and eye preference showed obviously higher frequencies of right type than those of left type. 2) The seven traits except leg folding had no significant sexual difference. 3) The differences between Bargud and Elute were greater than those between Bargud and Buriat. 4) Compared with other groups, the Mongols in Hulun Buir League showed a lower frequency of right hand clasping, a higher frequency of right arm folding and a moderate frequency of right leg folding. 5) Statistically significant correlation was found between 12 pairs of the traits.