PROBLEM TO BE SOLVED: To realize particle behavior simulation capable of shortening a calculation time under the consideration of the influence of an adhesive force.SOLUTION: A particle behavior simulation device 10 comprises: a contact force specification unit 13 for determining a corrected contact force using a corrected spring constant kd smaller than a spring constant kr when a contact force is expressed as a non-linear spring model; and a behavior calculation unit 12 for calculating the behaviors of particles using the corrected contact force as a contact force and a corrected adhesive force Fad which is set to a value smaller than an adhesive force Far according to the ratio between the spring constant kr and the spring constant kd as an adhesive force.
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