This article reviews the recent studies on the measures of achievement motivation. These measures are divided roughly into two kinds ; the projective measures and the selfreport measures. The former is reviewed in respect of the following three points : the materials, the subjects (age and sex), and the conceptual issues. The latter is reviewed in respect to the following three kinds of research : research on the need for achievement (n-Ach), on the resultant achivement motivation (RAM), and on the academic achievement motivation. The attention is especially given to the conceptual issues, the reliability and the validity of the measures. The results indicate the following problems. : 1) Conceptual issues ; There are so many ways of referring to the achievement motivation, and several n-Ach indices do not measure the same thing and must not be used interchangeably. 2) Reliabilities : The reliabilities of the self-report measures are relatively high, but the projective ones are not. 3) Validities : Generally speaking, the relation of n-Ach to gross performance measures is poorly correlated for both projective and the self-report measures. On the other hand, the relationships between n-Ach scores measured in the specific areas and the performances on the specific tasks are more satisfactory than the gross ones. 4) Factorial studies : There are few studies in the factor analytical approaches on the achievement motivation. Yet one study indicates that the situational factors are extrapolated from the projective measures while the self-report measures are not the case. Implications of the present study for future research are discussed accordingly.