The purpose of this study is to investigate the effects of the stimulus dimension of the films (simplicity-complexity) and need for cognition on the evaluation of films. Seventeen high need for cognition subjects and eighteen low need for cognition subjects watched two films. 'Raiders of the lost ark' was selected as the simple stimulus film and and 'Die Blechtrommel' was selected as the complex stimulus one. The ANOVA of the image evaluation score revealed significant interaction effects of the stimulus simplicity-complexity and need for cognition. High need for cognition subjects evaluated the complex stimulus film higher than low need for cognition subjects. The ANOVAs of cognitive effort, the evaluative dimension of the film impression, and the evaluation of image and music scores revealed significant main effects of need for cognition. These results indicated that high need for cognition subject's cognitive effort, evaluative score of the film impression, and the evaluation of image and music were higher than low need for cognition subject's ones.