Eye-movement and pupillary change are used as indecies in educational studies and behavioral analysis.Because they reflect the process of human information imput, it is possible to use them as indecies for human cognitive load.This paper evaluates cognitive load during driving simulation using eye-movement and pupillary changes.It defines the"eye-movement-vector"for quantitative analysis of the cognitive load in driving simulation using measurement of the eye-movement and an estimation of the pupillary size.Experimental results based on pupillary size increases, indicate that the cognitive load increases when coupled with task.In addition, the frequency of saccade increased and the time spent on gazing fell from previous cases.