This study aims to compare with motor imagery function between the LD group (age 10.2±1.7, IQ 91.0±14.2, total 9) and the normal school aged students as the controlled groups which are a lower grade (age 7.5±0, 08, total 38), a middle grade (age 9.5±0.08, total 36), and a higher grade (age 11.5±0.08, total 38). The author devised and employed an evaluation method-a card task-that recognized continuous movements based on the imagery function. He categorized the participants into the four groups, compared each group and examined the role and importance of the parameter of movement in the imagery function from the perspective of cognitive psychology. The results showed that there were no differences between the LD group and other groups in the percentage of correct answers and the velocity of the card tasks and in the percentage recall of primacy effect and recency effect of the test for memory of sequential positioning effect. Only the rate of the maximum recall misidentification in the LD group exposed further from the groups of normal children. Therefore, the LD group might have characteristic motor imagery function to compare with the groups of normal children.