The purpose of present study was to develop the Japanese version of the Need for Cognition Scale (NCS). Forty-five items, which had been used in the United States to select NCS, were administered to two groups. One group answered the items once, and the other group did twice and gave two sets of data. A factor analysis was performed on each set of three data, and yielded one major factor. The fifteen items, which gave high loadings on the every first factor and had no sex differences on scores, were selected as the Japanese version of NCS. The reliability and the validity of this scale were confirmed by some analyses.