Dispersal is an important component in population dynamics of a species as well as its distribution and persistence. Here, partial evidence of aerial dispersal of twospotted spider mite from an apple orchard to a contagious soybean field was described. Also, a mechanistic dispersal model was simulated using meteorological data and falling speed of twospotted spider mite. Model estimations were closely correlated with the observed distribution of twospotted spider mites within a soybean field. Further implication of the aerial dispersal and its modeling were discussed.