In order to analyze toner scattering phenomena, toner motion between parallel plates in a transfer process is observed with the model experimental setup. The number of toner scattering events is counted by the IMAGE ANALYSIS software, and the relationship between the number of toner scattering and the transfer gap is obtained. The three-dimensional toner motion is calculated with electrostatic simulation using the distinct element method. The experimental and simulated results relating the number of toner scattering and the transfer gap are in good agreement. The observations on the toner scattering process are carried out for various combinations of parameters in the transfer process. A quantitative relationship between the number of toner scattering events and the parameters is obtained, which can be explained by the model derived from the toner scattering behavior.